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Wednesday 7 March 2012

What is Difference Between HTTP and HTTPS Protocol

Hypertext Transfer Protocol (HTTP) is a protocol used in networking. When you type any web address in your web browser, your browser acts as a client, and the computer having the requested information acts as a server. When client requests for any information from the server, it uses HTTP protocol to do so. The server responds back to the client after the request completes. The response comes in the form of web page which you see just after typing the web address and press “Enter”.



Hypertext Transfer Protocol Secure (HTTPS) is a combination of two different protocols. It is more secure way to access the web. It is combination of Hypertext Transfer Protocol (HTTPS) and SSL/TLS protocol. It is more secure way to sending request to server from a client, also the communication is purely encrypted which means no one can know what you are looking for. This kind of communication is used for accessing those websites where security is required. Banking websites, payment gateway, emails (Gmail offers HTTPS by default in Chrome browser), and corporate sector websites are some great examples where HTTPS protocols are used.
For HTTPS connection, public key trusted and signed certificate is required for the server. These certificate comes either free or it costs few dollars depends on the signing authority. There is one other method for distributing certificates. Site admin creates certificates and loads in the browser of users. Now when user requests information to the web server, his identity can be verified easily.
Here are some major differences between HTTP and HTTPS:
HTTPHTTPS
URL begins with “http://”URL begins with “https://”
It uses port 80 for communicationIt uses port 443 for communication
UnsecuredSecured
Operates at Application LayerOperates at Transport Layer
No encryptionEncryption is present
No certificates requiredCertificates required

"Every File Extension in the World"


ALibrary file (Unix)
AObject code library
A3LAuthorware 3.x library
A3MAuthorware MacIntosh file (unpackaged)
A3WAuthorware Windows file (unpackaged)
A4LAuthorware 4.x library
A4MAuthorware MacIntosh file (unpackaged)
A4PAuthorware file (packaged without runtime)
A5LAuthorware 5.x library
A5WAuthorware Windows file (unpackaged)
AAAudible audio file (commonly used for downloadable audio books)
AAMAuthorware shocked file
AASAuthorware shocked packet
ABApplix Builder file
ABFAdobe Binary Screen Font
ABKCorel Draw AutoBackup
ABKBackup file (PrintMaster Gold)
ABMAudio album file (HitPlayer)
ABOApplix Builder Turbo file
ABPBarcode profile file in Alver Valley Software's AVS Barcode Source
ABSStandard GNU compiler output file for a PC platform
ABSSometimes used to denote an abstract (as in an abstract or summary of a scientific paper) AutoBackup
ABSAbsolute Database file format
AC$AutoCAD Undo Info file
AC3Dolby Digital audio files used on DVDs
ACAHTTP animation file (Microsoft Agent)
ACAProject Manager Workbench file
ACBACBM Graphic image
ACCDR-DOS Viewmax file
ACDSonic Foundry ACID file
ACEACE Archiver Compression file
ACFHTTP character file (Microsoft Agent)
ACIACI development appraisal (ACIWEB)
ACLCorel Draw 6 keyboard accelerator file
ACLList file for Microsoft Office
ACMInterplay compressed sound file (Fallout 1,2, Baulder's Gate)
ACMDynamic Link Library (DLL)
ACMWindows system directory file
ACPMicrosoft Office Assistant Preview file
ACRAmerican College of Radiology file
ACSCharacter structured storage file (Microsoft Agent)
ACTFoxPro Foxdoc Action Diagram
ACTAction Presentation
ACTMicrosoft Office Assistant Actor file
ACVUsed to Compress and decompress audio data
ADAfter Dark screensaver
AdaAda source text file (non-GNAT)
ADBHP 100LX Organizer Appointment database
ADBAda source text body file (GNAT)
ADBAbility Database file
ADCScanstudio 16 color Bitmap Graphic file
ADDOS/2 adapter driver file used in the boot process
ADFAmiga disk file
ADIAutoCAD device-independent binary plotter file
ADLQEMM Mca adaptor description library
ADMWindows NT policy template
ADMAfter Dark MultiModule screensaver (Microsoft)
ADNLotus 1-2-3 Add-In file
ADPFaxWorks Faxmodem setup file
ADPAstound Dynamite file
ADPMicrosoft Access project file
ADRSmart Address address book
ADRAfter Dark Randomizer screensaver
ADSAda source text specification file (GNAT)
ADTAdTech Fax file
ADTACT! document template file
ADXLotus Approach dBase Index
ADXArchetype Designer Document
ADXDynazip Active Delivery script
ADZPacked ADF file (Extracts with WinZip)
AEAuthor/Editor file (SoftQuad)
AEPArcExplorer project file
AF2ABC FlowCharter 2.0 Flowchart
AF3ABC Flowchart
AFCApple Sound file
AFITruevision Bitmap graphic
AFMHP NewWave Cardfile application
AFMAdobe metrics
AGApplix graphic
AICorel Trace drawing
AIAdobe Illustrator drawing
AIFAudio Interchange File, a sound format used by Silicon Graphics and Macintosh applications
AIFCSimilar to AIF (compressed)
AIFFSimilar to AIF
AIMAOL Instant Messenger Launch file
AINAIN Compressed archive
AIOAPL Input Output
AISVelvet Studio Instruments file
AISXerox Arry of Intensity Samples Graphic
AISACDSee Image Sequence
AIXHP NewWave Cardfile Application data
AKBHaleyAuthority Authority Knowledge Base File
AKWContains all A-keywords in the RoboHELP Help Project Index Designer not associated with topics
ALAWEuropean Telephony audio
ALBJASC Image Commander album
ALIDocument file (SAP proprietary format)
ALIASAlias Image
ALLWordPerfect for Windows General printer information file
ALLArts & Letters Library
ALSAlias Image
ALTWordPerfect Library Menu
AMApplix SHELF Macro
AMAdvantage database server data dictionary files
AMFDSMIA/Asylum module music (Crusader,No Remorse,Aladdin)
AMFMusic file (Advanced Module Format)
AMGACTOR System image
AMGAMGC Compressed Archive File
AMIAnnotation file (Cocreate SolidDesigner)
AMRAdaptive Multi-Rate Codec File
AMSExtreme's Tracker Module
AMSVelvet Studio music module (MOD) File
AMUSony Photo Album
ANText file (Sterling Software) (Groundworks COOL Business Team Model)
ANGroundworks text file
ANCCanon Computer Pattern Maker file that is a selectable list of pattern colors
ANIMicrosoft Windows Animated cursor
ANMDeluxPaint Animation
ANNWindows 3.x Help annotation
ANSANSI Text file
ANTSimAnt for Windows saved game
ANTData file for SFR Calculator (formerly CalcANT)
AOMAdobe Download Manager Online Manager Shortcut
AOMAdobe After Effects Output Settings
AOSNokia 9000 Add-on software
AOTApplicatio binary object template file (ZenWorks snAPPshot)
APWHAP Compressed Amiga archive
APApplix Presents file
APCLotus 1-2-3 Printer driver
APCCompiled application file (Centura Team Developer)
APDLotus 1-2-3 Printer driver
APDDynamic application library file (Centura Team Developer)
APEWinamp Plugins AVS File
APEMonkey's Audio Lossless Audio Compression Format
APFProject file (Allaire) (Created by Homesite)
APFLotus 1-2-3 Printer driver
APILotus 1-2-3 Printer driver
APIAdobe Acrobat plugin file
APLAPL Workspace file
APLApplication library file (Centura Team Developer)
APPSymphony Add-in Application
APPGenerated application or active document (Microsoft Visual FoxPro)
APPdBase Application Generator Object
APPDR-DOS Executable Application
APPNormal mode application file (Centura Team Developer)
APREmployee Appraiser Performance Review file
APRLotus Approach 97 View file
APRArcView project file
APSAdvanced patching systems with error checking, (Similar to IPS)
APSMicrosoft Visual C++ file
APTText mode application file (Centura Team Developer)
APTLotus Approach Data view file
APXBorland C++ Appexpert database
APXLotus Approach Paradox-Specific information file
AQApplix data
ARCSQUASH Compressed archive
ARCLH ARC (old version) compressed archive
ARFAutomatic Response file
ARFAdvanced Recording File (WebEx)
ARIAristotle audio file
ARIARI Compressed archive
ARJRobert Jung ARJ compressed archive (ARJ)
ARKARC File Archiver CPM/Port archive
ARLAOL v4.0 organizer file
ARRAtari Cubase Arrangement
ARTCanon Crayola art
ARTClip Art
ARTRay Tracer file
ARTFirst Publisher Raster graphic
ARTAOL Image file compressed using the Johson-Grace compression algorithm
ARTXara Studio drawing
ARXAutoCAD Runtime Extension
ARXARX Compressed Archive
ASApplix Spreadsheet
ASAMicrosoft Visual InterDev file
ASCPGP armored encrypted file
ASCASCII text file
ASDLotus 1-2-3 Screen driver
ASDMicrosoft Advanced Streaming Format (ASF) description file; opens with NSREX
ASDAstound Presentation
ASDWinWord AutoSave file
ASEVelvet Studio Sample file
ASFMicrosoft Advanced Streaming Format
ASFStratGraphics Datafile
ASFLotus 1-2-3 Screen font
ASFMusic file (Electronic Arts)
ASHTASM 3.0 Assembly language header
ASIBorland C++/Turbo C Assembler Include file
ASMPro/E assembly file
ASMAssembler Language source file
ASOAstound Dynamite Object
ASPProcomm Plus setup and connection script
ASPAstound Presentation
ASPActive Server Page (an HTML file containing a Microsoft server-processed script)
ASRTCAurelloSoft Removal Tool Configuration File
ASTClaris Works "assistant" file
ASTAstound multimedia file
ASVDataCAD Autosave file
ASXMicrosoft Advanced Streaming Redirector file
ASXVideo file
ASXCheyenne Backup script
AT2Aldus Persuasion 2.0 Auto Template
ATMAdobe Type Manager data/info file
ATTAT&T Group 4 bitmap
ATTData file commonly used with Web forms
ATWAnyTime Deluxe for Windows personal information manager file from Individual Software MultiModule screensaver
AUAudio U-law (pronounced mu-law)
AUSun/NeXT/DEC/UNIX sound file
AUDAudio file (Westwood Studios) (Kyrandia 3,C&C,RedAlert,C&C:TS)
AUPAudacity project file
AUXChiWriter Auxilliary Dictionary file
AUXTeX/LaTeX Auxilliary Reference file
AVAAvagio Publication
AVBInculan Anti-Virus virus infected file
AVGAVG Virus Information Database
AVIMicrosoft Audio Video Interleaved file for Windows movie
AVRAudio Visual Research file
AVSStardent AVS-X Image
AVSApplication Visualization System file
AVXFile Extension (ArcView)
AWApplix Words file
AWHP AdvanceWrite Text file
AWDFaxView Document image
AWEAcrobat Bookmark XML File
AWKAWK Script/Program
AWMAnimation Works Movie
AWRTelsis file for digitally stored audio
AWSStatGraphics Data file
AXLArcIMS XML project file
AXTASCII application object template (ZenWorks snAPPshot)
AXXARJ compressed file from a multi-volume archive (xx = a number from 01 to 99)
IAMAutodesk Inventor assembly file


BBASIC language source file
B_WAtari/Macintosh black and white graphic
B&W1st Reader Mono binary screen image
B&WAtari/Macintosh black and white graphic
B1Open source backup and archive file format
B1N1st Reader Mono and color binary screen image
B30ABC Ventura publisher printer font
B4Helix Nuts and Bolts file
B8Raw graphic file (Piclab Plane II)
BADOracle bad file
BAKBackup file
BALBallade Music score
BANDGarageband Project song
BARdBase Application Generator Horizontal menu object
BARGame data file used with Age of Mythology and Age of Empires 3
BASBASIC source code
BATBatch file
BBPapyrus Database backup
BBLTeX/BibTeX Bibliographic reference file
BBMDeluxe Paint Bitmap image
BBSBulletin Board Sytem text
BCHDatalex Entry Point 90 Data file
BCHBatch Process Object (dBase Application Generator)
BCMMicrosoft Works Communications file
BCOBitstream Outline font description file
BCPBorland C++ Makefile
BCWBorland C++ 4.5 Environment settings file
BDBMicrosoft Works Dababase file
BDFEgret Datafile
BDFWest Point Bridge Designer file
BDFAdobe font file
BDRMicrosoft Publisher Border
BEZBitstream Outline font description
BF2Bradford 2 Font
BFCWindows 95 Briefcase Document
BFMFont Metrics file (Unix/Mainframe)
BFXFax document file (BitFax)
BGMicrosoft Backgammon Game file
BGAOS/2 Graphic array
BGIBorland Graphics Interface Driver
BGLMicrosoft Flight Simulator Scenery file
BHFpcAnywhere Host file
BIBinary file
BIBTeX/BibTeX Literature Database
BIBDatabase
BIBBibliography file (ASCII)
BIFImage Capture Board Binary Image black & white graphic
BIFGroupWise initialization file
BIFBoot information file
BIFFXLITE 3D file
BIGElectronic Arts Game MOD File
BINBinary file
BIOOS/2 Bios file
BITX11 Bitmap
BITImported map file used by Worms Armageddon and Worms World Party
BKJetFax Faxbook file
BKBackup file (Generic)
BK!WordPerfect for Windows Document backup
BK$Backup file (Generic)
BK1WordPerfect for Windows Timed backup file for document window 1
BK2WordPerfect for Windows Timed backup file for document window 2
BK3WordPerfect for Windows Timed backup file for document window 3
BK4WordPerfect for Windows Timed backup file for document window 4
BK5WordPerfect for Windows Timed backup file for document window 5
BK6WordPerfect for Windows Timed backup file for document window 6
BK7WordPerfect for Windows Timed backup file for document window 7
BK8WordPerfect for Windows Timed backup file for document window 8
BK9WordPerfect for Windows Timed backup file for document window 9
BKPTurboVidion Dialog Designer Backup
BKSMicrosoft Works Spreadsheet Backup
BKSIBM BookManager Read bookshelf file
BKWFontEdit Fontset mirror image
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CSite configuration for Secure Remote (CheckPoint VPN)
CC code
C--Sphinx C-- Source code
C00Ventura Publisher Print file
C01Typhoon wave
C86Computer Innovation (C86) Source code
CATelnet Server Initial cache data file
CABMicrosoft cabinet file (program files compressed for software distribution)
CACdBase IV Executable file
CACHEShared Cache file
CADAutoCAD drawing database file
CAGCatalog file (Microsoft Clip Gallery v. 2.x,3.x,4.x)
CALSuperCalc 4/5 Spreadsheet
CALCalendar schedule data file
CALCALS Compressed Bitmap
CAMCasio camera file
CANNavigator Fax
CAPCompressed music file
CAPTelix Session Capture file
CAPVentura Publisher Caption
CARAtHome assistant file
CASComma-delimited ASCII file
CASread-only memory (ROM) file from an Atari Cassette
CATdBase Catalogue file
CATQuicken IntelliCharge categorization file
CATCatalog file format for Advanced Disk Catalog
CBMicrosoft clean boot file
CBCCubiCalc Fuzzy Logic System file
CBFVietcong (game) Pterodon big file
CBIColumn binary file (used in IBM mainframe systems)
CBLCobol Source code
CBMXLib Compiled Bitmap
CBRComic book or paperback RAR file (decompress with RAR utility)
CBTGeneric Computer based training file
CBZComic book or paperback ZIP file (decompress with WinZip or similar program)
CCC++ Source code
CCVisual dBASE custom class file
CC3Close Combat 3 file
CCAcc:mail archive file
CCBVisual Basic Animated Button configuration file
CCCCurtain Call Native bitmap graphic
CCDElaborate Bytes Clone CD mapfile for creating and reading .img files
CCEData file (Calendar Creator Plus)
CCFSymphony Communications Configuration file
CCFMultimedia Viewer configuration file used in OS/2
CCHCorel Chart
CCLIntalk Communication Command Language
CCMLotus CC:Mail "box" file (for example, INBOX.CCM)
CCOXBTX Graphics
CCOCyberChat data file
CCTMacromedia Director Shockwave cast file
CDACD Audio Track
CDBCardScan Database (CardScan)
CDBTCU Turbo C Utilities Main database
CDBConceptual model backup file (PowerDesigner)
CDBClipboard file
CDFNetcdf Graphic file
CDFMicrosoft Channel Definition Format
CDFSCompact Disk filing system
CDIPhillips Compact Disk Interactive file
CDKAtari Calamus Document
CDMVisual dBASE custom data module
CDMConceptual data model file (PowerDesigner Data Architect) (Sybase)
CDMConceptual model file (PowerDesigner)
CDRRaw Audio-CD data file
CDRCorel Vector Graphic Drawing File
CDRCorel Draw Vector drawing file
CDTCorelDraw Data file
CDTCorel Draw template
CDXMicrosoft's Visual Foxpro index
CDXCorel Draw compressed drawing
CEThe FarSide Computer Calendar Main CE file
CEFCruzer encrypted file (used to secure files on Cruzer USB flash drives)
CEGTempra Show Bitmap graphic
CELAutoDesk Animator Cel Image
CELCIMFast Event Language file
CERCertificate file (MIME x-x509-ca-cert)
CEXCaddie Exchange file
CFImake Configurtion file
CFBComptons Multimedia file
CFGConfiguration file
CFLCorelFLOW Chart
CFMVisual dBASE Windows customer form
CFMCorel FontMaster file
CFMCreative FM-Music
CFMColdFusion template
CFNAtari Calamus Font data file
CFOTCU Turbo C Utilities C form object
CFPThe Complete Fax Portable fax file
CGAVentura Publisher Display font file
CGICommon gateway interface script
CGMComputer Graphic Metafile
CHClipper 5 Header
CHOS/2 configuration file
CH3Harvard Graphics 3.0 Chart
CH4Charisma 4.0 Presentation
CHDFontChameleon Font descriptor
CHFpcAnywhere remote control file
CHIChiWriter Document
CHKWordPerfect for Windows Temporary file
CHKFile fragments saved by Windows Disk Defragmenter or ScanDisk
CHLConfiguration History Log
CHMCompiled HTML file
CHNEthnograph Data file
CHPVentura Publisher Chapter file
CHRCharacter Sets (Borland)
CHTHarvard Graphics Vector file
CHTChartMaster dBase Interface file
CHTChartViewer file
CIFEasy CD Creator image
CIFpcAnywhere caller file
CIFCalTech Intermediate Graphic
CILClip Gallery download package file
CIMSim City 2000 file
CINKodak Cineon Bitmap file
CIXTCU Turbo C Utilities Database Index
CK1iD/Apogee Commander Keen 1 data
CK2iD/Apogee Commander Keen 2 data
CK3iD/Apogee Commander Keen 3 data
CK4iD/Apogee Commander Keen 4 data
CK5iD/Apogee Commander Keen 5 data
CK6iD/Apogee Commander Keen 6 data
CKBBorland C++ Keyboard mapping file
CKFCasio Keyboard File
CLGeneric LISP Source code
CL3Layout file (Adaptec Easy CD Creator)
CLASSJava class
CLCTI-83 Plus Flash Debugger file
CLGWindows Catalog file
CLLCricket Software Clicker File
CLOCloe Image
CLPQuattro Pro Clip art
CLPClipper 5 Compiler Script
CLPWindows Clipboard
CLRPhotStyler Color defintion
CLR1st Reader Binary color screen image
CLSC++ Class Definition
CLSVisual Basic Class Module
CLXMacro ToolsWorks Macro file
CLXRational XDE file
CLXAdobe file
CMCraftman Data
CMADatabase file in plain text format (APPLIX TM1)
CMDDOS CP/M command file
CMDdBase-II program file
CMD1st Reader External Command Menu
CMDCommand file for Windows NT (similar to a DOS .BAT file), OS/2
CMFCorel Metafile
CMFCreative Music File
CMGChessmaster saved game
CMKCard Shop Plus file
CMMCEnvi Batch file
CMPAddress document
CMPCorelDRAW 4.0 Postscript Printer Header
CMPRoute 66 Address Document
CMPMicrosoft Word for DOS User dictionary
CMPJPEG Bitmap
CMRMediaPlayer Movie
CMVCorel Move animation
CMXCorel Presentation Exchange image
CMYKRaw cyan, magenta, yellow, and black bytes file
CNCClick 'N Create General Program data
CNFConfiguration file used by Telnet, Windows, and other applications with varying internal formats
CNMWindows application menu options and setup file
CNQCompuworks Design Shop file
CNTWindows (or other) system content files for the help index and other purposes
CNVWordPerfect for Windows Temporary file
CNVConversion files (WS_FTP Pro) files that will be converted from (Example) "HTML-"HTM" for upload
CNVWord for Windows Data conversion support file
COBCOBOL Source code
COBtrueSpace 2 object
CODFORTRAN Compiled code
CODdBase Application Generator Template source file
CODVideo Text file
CODMicrosoft C compiler output as displayable machine language/assembler with original C as comments
COEXilinx coefficient
COLMicrosoft Multiplan Spreadsheet
COLAutoDesk Animator Color Palette
COMCommand file (program)
CONSimdir Configuration file
CPCryptoPad.NET Encrypted document
CP8CP8 256 Gray Scale image
CPDFax Cover document
CPDComplaints Desk Script
CPDCorel PrintOffice file (drawing)
CPEFax Cover document
CPFThe Complete Fax (Fax file)
CPFCORDIS CPF Editor Contract Preparation Form Submission File
CPFColor palette file
CPHImage file (Corel Print House) see CPO
CPIColorLab Processed Image bitmap
CPIMicrosoft MS-DOS code page information
CPJCeQuadrant CD Project
CPLCompel Presentation
CPLCorel color palette
CPLControl Panel Module
CPMTurbo Pascal DOS file
CPMZUsed to exchange project data between Miradi and ConPro
CPOImage file (Corel Print Office)
CPPCA-Cricket Presents presentation
CPPC++ Source code
CPRCorel Presents presentation
CPSColoured postscript
CPSCentral Point PC Tools Backup
CPSCorel Photo House image file
CPTMacintosh Compressed Archive
CPTdBase Encrypted Memo
CPTCA-Cricket Presents Template
CPTCorel Photo-Paint image
CPXCorel Presentation Exchange compressed drawing
CPYData file (Copy Books)
CPYeCopy Desktop or eCopy Paperworks document file
CPZCOMPOZ Music Text
CRCCyclical Redundancy Check checksum file
CRCCircular reference file (Pro/Engineer)
CRDMicrosoft Windows 3.x Cardfile
CRDText file used for guitar chords, tablature and lyrics
CRFZortech C++ cross-reference
CRHImage file (Microsoft Golf)
CRPVisual dBASE custom report
CRPdBase IV Encrypted database
CRPCorel Presents run-time presentation
CRSWordPerfect 5.1 for Windows File Conversion resource
CRTOracle Terminal settings information
CRTCrontab file)
CRTCertificate file
CRUCRUSH Compressed archive
CS1Sinar CaptureShop raw file for Macintosh
CS16Sinar CaptureShop raw file for Macintosh
CS4Sinar CaptureShop raw file for Macintosh
CSAComma deliminated text
CSCCorel script file
CSGStatistica/w Graph file
CSHC shell script files (Hamilton Labs)
CSMScript file (Kodak Dc265 Camera)
CSMBorland C++ 4.5 Precompiled header
CSOCustomer service data and outcome file
CSPPC Emcee On-Screen image
CSSStatistica/w Datasheet
CSSStats+ Datafile
CSSCascading Style Sheet (MIME)
CSTMacromedia Director "Cast" (resource) file
CSVCompuShow Adjusted EGA/VGA Palette
CSVComma-separated values file
CTA graphic file associated with the Paint Shop Pro Graphic Editor
CTScitex CT bitmap
CTCheat Engine data file for game cheats
CTBAutoCAD Color-dependent Plot Style Table
CTCPC Installer Control
CTFSymphony Character code translation
D2D2D/3D object file (3-D Fassade Plus)
D64Commodore 64 emulator disk image
DAAPowerISO Direct-Access-Archive
DAFDigital Anchor data file, a secure database file for the Digital Anchor Database Engine
DAOWindows Registry Backup
DAPData access page (Microsoft Access 2000)
DARDVD Architect File
DATA data file extension used to designate an error message in a inbound internet email message (Microsoft Exchange Server v 5.0)
DATWordPerfect Merge Data
DATExtension used for some MPEG files
DATYahoo Messenger archive file
DATData file
DBMicrosoft Access database file
DBCMicrosoft's Visual FoxPro database container file
DBCDatabase Connect Descriptor File
DBFEnable database (can be opened with Excel 97)
DBFOracle 8.1.x tablespace file
DBFA dBASE file, a format originated by Ashton-Tate, but understood by Act!, Clipper,FoxPro, Arago, Wordtech, xBase, and similar database ordatabase-related products.
DBKSchematic backup file (Orcad Schematic Capture)
DBKdBase Database Backup
DBKmobile phone backup files generated by Sony Ericsson PC Suite
DBOCompiled program file (dBase IV)
DBQParadox Memo
DBSMicrosoft Word printer description file
DBSPRODAS data file
DBSSQL Windows database
DBSManaging Your Money data file
DBTdBase Text Memo
DBVMemo field file (Flexfile 2)
DBWMicrosoft Windows 9.x Database file (DataBoss)
DBXOutlook Express mail folder
DBXMicrosoft's Visual FoxPro Table file
DBXDataBeam image
DCCAD file (DesignCAD)
DC2CAD file (DesignCAD)
DC5DataCAD Drawing
DCAVisual Basic Active designer cache
DCADocument Content Architecture Text file (IBM DisplayWrite)
DCFDRM content format
DCFPrimus-DCF file
DCIMDigital Imaging and Communications in Medicine (image and data)
DCLAutoCAD Dialog Control Language Description file
DCMDCM module
DCPData CodePage (OS/2)
DCRShockwave file
DCSBitmap Graphics (Quark XPress)
DCSDatafile (ACT! Activity file)
DCSDesktop Color Separation file
DCTDatabase Dictionary file (Clarion Database Developer)
DCTDatabase SpellCheck Dictionary (Harvard Graphics 3.0-Symphony)
DCTMicrosoft's Visual FoxPro database container file
DCUDelphi compiled unit
DCXFax image (based on PCX)
DCXMacro file
DCXBitmap Graphics file (Multipage PCX)
DCXMicrosoft's Visual FoxPro database container file
DDCompressed Archive (Macintosh DISKDOUBLER)
DDBBitmap Graphics file
DDFBtrieve or Xtrieve Data Definition File
DDIImage File (DISKDUPE)
DDIFDigital Equipment or Compaq file. Used for storing images and their word processing documents
DDPDevice Driver Profile (OS/2)
DEBDebug Script (DOS Debug)
DEFDefine Module file (3-D Fassade Plus)
DEFC++ definition file
DEFAssembly Header file (Geoworks)
DEFSmartWare II data
DEFIOracle 7 de-install script
DEMA file with USGS standards for Digital Elevation Models (Vista Pro)
DEMGraphics file (Vista Pro)
DEMDemo file (Descent)
DEPVisual Basic Setup Wizard Dependency file
DERCertificate file
DEVDevice Driver
DEWFMacintosh SoundCap/SoundEdit recorded instrument file
DEZEncrypted zip file (DES Encryption)
DFDData Flow Diagram Graphic (Prosa)
DFIOutline Font description (Digifont)
DFLDefault Program Settings (Signature)
DFMData Flow Diagram model (Prosa)
DFSSound File (Delight)
DFVPrinting Form value (Microsoft Word)
DGNMicrostation95 CAD drawing
DGNBentley Systems drawing file
DGSDiagnostics Report
DHDependency Information file (Geoworks)
DHPGraphic file (Dr. Halo II-III PIC Format)
DHSShadowgrounds Savegame File
DHTDatafile (Gauss)
DIAMicrosoft Sharepoint temporary file
DIBDevice-independent bitmap
DICDictionary file (Lotus Notes, Domino)
DICDictionary file
DICMDigital imaging and communications in medicine file (DICOM)
DIFDatabase file (VisiCalc)
DIFData Interchange Output file
DIFText file (Output from Data Interchange Format)
DIFData Interchange Format spreadsheet
DIGSound Designer I audio
DIGDigilink file
DIPGraphics file
DIRDialing Directory (ProComm Plus)
DIRDirectory (VAX) (DEC)
DIRMovie (MacroMind Director 4.x)
DIRMacromedia Director file
DISDistribution file (VAX Mail)
DISThesaurus file (CorelDraw)
DISRay Tracer file
DIZDescription file (Description in ZIP)
DJSNASCAR Thunder game music file
DJSData Junction Integration map
DJVUDjVu compressed image file
DKBGraphics file (Ray Traced DKBTrace)
DLImage
DLDDatafile (Lotus 1-2-3)
DLGC++ Dialogue Script
DLLExport/Import Filter (CorelDraw)
DLLDynamic-link library file
DLSInteractive music architecture (IMA)(Microsoft),(Blood2)
DLSSetup file (Norton DiskLock)
DLSDownloadable sound
DMDVisual dBASE data module
DMFX-Trakker music module (MOD)
DMFPacked Amiga disk image
DMGMacintosh disk image file (copy of contents of a hard disk or CD)
DMODemo file (Derive)
DMPDump file (Screen or Memory)
DMSCompressed Archive (Amiga DISKMASHER)
DOBVisual Basic User document
DOCWordStar document
DOCWordPerfect document
DOCMicrosoft Word document
DOCDisplayWrite document
DOCDocument format (Interleaf)
DOCFrameMaker or FrameBuilder document
DOGScreen Saver file (Laughing Dog Screen Saver)
DOHDependency Information file (Geoworks)
DOSNetwork Driver file (PKT_DIS.dos)
DOSText file (DOS)
DOSExternal Command file (1st Reader)
DOTLine-Type definition (CorelDraw)
DOTWord Document Template (Microsoft Word for Windows)
DOXText file (MultiMate 4.x)
DOXUser document binary form (Visual Basic)
DOZDescription out of Zip (VENDINFO)
DPDatafile (DataPhile)
DPCalendar file (Daily Planner)
DPLBorland Delphi 3 packed library
DPRProject header (Borland C++)
DPTPublication file (Publish-It!)
DR9Directory file
DRADragon NaturallySpeaking file
DRAWAcorn's object-based vector image
DRCDesign rules check report file (Orcad Schematic Capture)
DRGMotion Software Dyno2000 Car Design
DRGVLBI and Tied Array Drudge Tasking Document
DRGAllyCAD file
DRSDisplay Resource file (WordPerfect for Windows)
DRVDevice Driver (Required to make a device function)
DRVDriver file
DRWLotus Freelance image
DRWMicrografx vector graphics file
DRWPro/E drawing
DRWCaddie CAD drawing
DS4Vector Graphics (Micrografx)
DS4Micrografx Designer Image
DSCDiscard file (Oracle)
DSDDatabase file (DataShaper)
DSFMicrografx Designer v7.x file
DSGDooM saved game
DSKDriver file (Novell Netware)
DSKProject Desktop file (Borland C++/Turbo Pascal)
DSMDigital Sound Module (DSI)
DSMMusic module file (DSIK)
DSMDynamic Studio music module (MOD)
DSNDesign (Object System Designer)
DSNSchematic file (Orcad Schematic Capture)
DSNODBC Data source
DSPDisplay parameters (Signature)
DSPGraphics Display driver Dr. Halo)
DSPMicrosoft Developer Studio project
DSQCorel QUERY
DSRDriver Resource (WordPerfect for Windows)
DSRVisual Basic Active designer file
DSSDigital Sound file (Digital Soup))
DSSScreensaver file (DCC)
DSTDistribution file (PC-RDist, by Pyzzo)
DSTEmbroidery machines graphic file
DSWMicrosoft Developer Studio workspace file
DSWDesktop settings (Borland C++ 4.5)
DSXVisual Basic Active designer binary file
DT_Data file fork (Macintosh)
DTADatafile (Turbo C++)
DTAWorld Bank's STARS data
DTAData file (EZ-Forms)
DTD|SGML Document Type Definition (DTD) file
DTEDDigital terrain elevation data (geographic data format)
DTFSymantec Q&A relational database
DTFDatabase file (PFS-Questions & Answers)
DTFDatabase file for ACDSee
DTMModule file (DigiTrakker)
DTPText Document (Timeworks Publisher 3.x)
DTPTemplate file (Pressworks)
DTPDesktop layout file (Publish-iT)
DUNMicrosoft Dial-up Networking Export file
DUPDuplicate Backup
DUSReadiris font dictionary
DVDigital video (MIME)
DVCDatafile (Lotus 1-2-3)
DVFGraphics file associated with camcorders (DV Studio)
DVIDevice Independent Document (TeX) (LaTeX)
DVPDevice parameter file (AutoCAD)
DVPDesqview Program information (DESQview)
DW2Drawing file (DesignCAD for Windows)
DWCCompressed Archive (DWC)
DWDDiamondWare digitized file
DWFDrawing Web file (Microsoft WHIP autoCAD reader)
DWFVector graphic (Autodesk)
DWGAutoCAD drawing, or older Generic CAD drawing file
DWGAutoCAD Drawing
DWHExpress Tools log file
DWIStepfile format for Dance Dance Revolution simulator
DWPDocument file (DeScribe)
DWSWorkspace file (Dyadic)
DWTDreamweaver Web Page Template
DXDigital Electric Corporation (DEC) Data exchange file
DXBAutoCAD Drawing Exchange Format file
DXFDrawing Interchange Format (AutoCAD)
DXFData Exchange File
DXFDrawing Interchange (eXchange) format,a text representation of the binary DWG format
DXNFax document (Fujitsu dexNet)
DXRMacromedia Director protected (not editable) movie file
DYNDatafile (Lotus 1-2-3)
BLBResource archive (DreamWorks),(Neverhood)
BLBBLOB file used with various database software
BLDBASIC Bloadable picture file
BLENDData file for Blender 3D modeling suite.
BLKWordPerfect for Windows Temporary file
BLKAlias Wavefront Image
BMWindows system Bitmap
BM1Apogee BioMenace data
BMASong format used by Beatmania emulators
BMFCorel Gallery file
BMFBinary Material File
BMKWindows Help bookmark
BMPWindows or OS/2 bitmap
BNInstrument bank file (AdLib)
BNKInstrument Bank file (AdLib)
BNKSound effects bank file (Electronic Arts)
BOLCompressed archive library file (Microsoft Booasm.arc)
BOMBill of materials file
BOOMicrosoft Booasm.arc Compressed archive
BOOKAdobe FrameMaker Book
BOXLotus Notes file
BPCBusiness Plan Toolkit Chart
BPLBorland Delphi 4 packed library
BPSMicrosoft Works Document
BPTCorelDraw Bitmap fills file
BPXTruevision Targa Bitmap
BQYBrioQuery file
BRBridge Script
BR0PrintMaster graphics file
BRDEagle Layout file
BRKBrooktrout Fax-Mail file
BRWApplication file associated with financial institution(s) loan applications
BRXA file for browsing an index of multimedia options
BRZDbBRZ file for very large Db backup or restore
BS_Microsoft Bookshelf Find Menu shell extension
BS1Apogee Blake Stone data file
BSABSARC Compressed archive
BSAData file used with Bethesda games
BSCFortran Pwbrmake Object
BSCMS Developer Studio (MSDev) browser information
BSCApple II Compressed archive
BSPQuake map file
BTMBatch file used by Norton Utilities
BTRDatabase file (Btrieve 5.1)
BUDBackup disk for Quicken
BUGBugs and Problems file
BUNCakeWalk Audio Bundle (a MIDI program)
BUPBackup
BUTButtons! Button definition
BUYMovie data file
BV1WordPerfect for Windows Overflow file below insert point in document 1
BV2WordPerfect for Windows Overflow file below insert point in document 2
BV3WordPerfect for Windows Overflow file below insert point in document 3
BV4WordPerfect for Windows Overflow file below insert point in document 4
BV5WordPerfect for Windows Overflow file below insert point in document 5
BV6WordPerfect for Windows Overflow file below insert point in document 6
BV7Wordperfect for Windows Overflow file below insert point in document 7
BV8WordPerfect for Windows Overflow file below insert point in document 8
BV9WordPerfect for Windows Overflow file below insert point in document 9
BWSilicon Graphics Raw red,green and blue bytes file
BWSGI Black and White image file
BWBVisual Baler Spreadsheet application
BWRKermit Beware buglist
BWVBusiness Wave file
BYUBYU Movie
BZBzip compressed file (Inix)
BZ2Bzip compressed file (Unix) (replaces Bz)
EAmiga E Source Code file
EEiffelStudio Source File
E00Coverage export file (ArcInfo)
EASMSolidWorks eDrawing Electronic Assembly Data File
EBJError Checking Object file (Geoworks)
ECWVECTOR structured graphics files
ECWRASTER structured graphics
ECWCompressed image files for aerial and satellite map projections
ED5EDMICS image
ED6EDMICS image
EDAEnsoniq ASR disk image
EDBROOTS3 Geneological data file
EDDElement Definition document (FrameMaker+SGML documents)
EDEEnsoniq EPS disk image
EDKEnsoniq KT disk image
EDQEnsoniq SQ1/SQ2/KS32 disk image
EDSEnsoniq SQ80 disk image
EDTDefault settings (VAX Edt editor)
EDVEnsoniq VFX-SD disk image
EEBButton Bar for Equation editor (WordPerfect for Windows)
EFAEnsoniq ASR file
EFEEnsoniq EPS file
EFKEnsoniq KT file
EFQEnsoniq SQ1/SQ2/KS32 file
EFSEnsoniq SQ80 file
EFTHigh Resolution Screen Font (ChiWriter)
EFVEnsoniq VFX-SD file
EFXFax document (Efax Reader)
EFXFax Document (Everex EFax)
EGAEGA Display font (Ventura Publisher)
EGMBentley Systems drawing file
ELLisp Source code (eMacs)
ELCeMac Lisp Source code (byte-compiled)
ELMTheme-Pack file for (Microsoft FrontPage)
ELTEvent List Text file (Prosa)
EMAILMicrosoft Outlook Express mail message (save to desktop, scan for viruses, then convert to an EML file before opening)
EMBEmbedded bank File (Everest)
EMDABT Extended MoDule
EMFEnhanced Windows Metafile
EMLMicrosoft Outlook Express mail message (MIME RFC 822)
EMSEnhanced Menu System Configuration file (PC Tools)
EMUTerminal Emulation Data file (BITCOM)
EMZWindows Compressed Enhanced Metafile, a graphic format used in Office and Visio
ENCVideo file
ENCEncoded file (UUENCODEd File, Lotus 1-2-3)
ENCMusic file (Encore)
ENDArrow-Head Definition Table (CorelDraw)
ENFFNeutral Format
ENGChart Graphics file (EnerGraphics)
ENGDictionary Engine file (Sprint)
ENVEnvironment file (WordPerfect for Windows)
ENVEnveloper Macro (WOPR)
ENVAdobe Acrobat and Acrobat reader files
EPDPublication file (Express Publisher)
EPHTMLEnhanced Perl-parsed HTML
EPIDocument file (Express Publisher)
EPRTSolidWorkseDrawing CAD file
EPSPrinter font (Epson, Xerox, Ventura Publisher)
EPSEncapsulated Postscript image file
EPSEncapsulated Postscript Vector graphics (Adobe Illustrator)
EPS2Adobe Level II Encapsulated Postscript
EPSFEncapsulated PostScript
EPSIAdobe Encapsulated Postscript Interchange
EQNEquation file (WordPerfect for Windows)
ER1ERWin file
ERDEntity Relationship Diagram graphic file (Prosa)
ERMEntity Relationship Diagram Model file (Prosa)
ERRCompilation error file (Microsoft Visual FoxPro)
ERRstored error message file
ERXERWin file
ESHExtended Shell Batch file (DOS)
ESLDistributable support library file (Microsoft Visual FoxPro)
ESPSESPS audio file
ESTInteractive Cost Estimating 2000 file
ESUESRI Single Use License Information file
ETEasiTeach document
ETHDocument file (Ethnograph 3.x)
ETXStructure Enhanced text (SetText)
EUIEnsoniq ESP family compacted disk image
EVTEvent Log (Microsoft Windows NT, 2000)
EVYDocument (WordPerfect for Windows Envoy)
EWDText Document (Express Publisher for Windows)
EWLMicrosoft Encarta document
EX3Device Driver file (Harvard Graphics 3.x)
EXCSource Code file (Rexx VM/CMS)
EXCExclude file for Optimize (do not process, QEMM)
EXCMicrosoft Word Exclusion Dictionary file
EXEExecutable file (program)
EXPSaved chat (ICQ)
EXPExported files format
EXTASCII binary transfer file (WS_FTP PRO) (IPSWITCH Software)
EXTExtension file (Norton Commander)
EXT2Second extended file system (Linux)
EXT3Third extended file system (Linux)
EZPCompressed file (Edify.zip) (Edify Electronic Workforce Backup Utility