We come across different types of files with different file extensions and file formats. Here are some of the compiled list.
The following list is comprised of important file file formats that we see daily
AMV Video Format (.amv)
Apple Quicktime (.mov)
ASF Video (.asf)
Audio Video Interleave (.avi)
Digital Video File (.dv)
DPG Video (.dpg)
DVD Video Object (.vob)
Flash SWF (.swf)
Flash Video (.flv)
FLIC Animation (.fli)
Google Video File (.gvi)
Matroska (.mkv)
MPEG 1 (.mpg)
MPEG-2 (.mpg)
MPEG-4 (.mp4)
NSV (.nsv)
OGG video (.ogg)
Ogg Vorbis compressed video (.ogm)
RealVideo (.rm)
RPL video (.rpl)
Video stream descriptor (.asx)
Windows Media Video (.wmv)
Sound
3GP Music (.3gp)
AC3 Audio File (.ac3)
Adaptive Multi-Rate (.amr)
Adaptive Multi-Rate WB (.awb)
Advanced Audio Coding (.aac)
AMIGA 8bit sound file (.8svx)
AMIGA sound file (.maud)
APE Monkey Audio (.ape)
ASF Audio (.asf,.wma)
Audio Interchange File Format (.aiff)
Audio Visual Research (.avr)
FastTracker II module (.xm)
Free Lossless Audio Codec (.flac)
ImpulseTracker module (.it)
IRCAM sound file (.sf)
MPEG advanced audio coding (.mp4)
MPEG-1/2 Audio Layer 3 (.mp3)
MPEG-4 advanced audio coding (.m4a)
MPEG-4 advanced audio coding (.m4b)
Musepack (.mpc)
Ogg Vorbis (.ogg)
PSION 8bit sound file (.wve)
PSION sound file (.prc)
PureVoice File (.qcp)
RealAudio (.ra,.rm)
ScreamTracker module (.s3m)
Soundblaster file (.voc)
SoundTool (.sndt)
Soundtracker module (.mod)
Sun Microsystems' audio format (.au,.snd)
TwinVQ (.vqf)
WAVE form audio format (.wav)
Yamaha TXW sampler (.txw)
Ringtone (PCM + Polyphonic)
MMF/AF-2 (.mmf,.smaf)
MMF/SMAF-3 poly+pcm (.mmf,.smaf)
Ringtone (Monophonic / Polyphonic)
Eericsson emelody (.emy)
iMelody Ringtone Format (.imy)
Midi karaoke (.kar)
MIDI-0 (.mid,.midi)
MMF/SMAF-1 (.mmf,.smaf)
Mobile Phone Ringtone (.rtx)
Motorola Ringtone (.mot)
Nokia Phone Ring Tone (.nokia)
Nokia Phone Ring Tone (.noktxt)
Nokia Phone Ring Tone (.ott)
Qualcomm CMX 3.0 (.pmd)
Ringtones text transfer language (.rtttl)
Sagem Ringtone (.sagem)
Sagem Ringtone (.sagem21)
SP-MIDI (.mid,.midi)
Image
Adobe Photoshop bitmap file (.psd)
Apple Macintosh QuickDraw (.pict)
AVS X image (.avs)
Flexible Image Transport System (.fits)
Graphics interchange format (.gif)
Irix RGB image (.sgi)
Joint ph. experts group (.jfif,.jif,.jpe,.jpeg,.jpg)
Kodak Cineon Image Format (.cin)
Magick image file format (.miff)
Microsoft icon (.ico)
On-the-air Bitmap (.otb)
Palm pixmap (.palm)
Photo CD (.pcd)
Photo CD - sRGB color (.pcds)
Portable anymap (.pnm)
Portable bitmap format black/white (.pbm)
Portable network graphics (.png)
portable pixmap file format (.pgm)
Portable pixmap format - color (.ppm)
SMPTE digital moving picture exchange (.dpx)
SUN Raster Image (.ras,.sun)
Tagged Image File Format (.tif,.tiff)
Truevision TGA (.tga)
Utah RLE encoded image (.rle)
Windows bitmap (.bmp)
Windows device independent bitmap (.dib)
X Windows system bitmap black/white (.xbm)
X Windows system pixmap (.xpm)
Xv's Visual Schnauzer thumbnail (.p7)
ZSoft IBM PC multi-page Paintbrush (.dcx)
ZSoft IBM PC Paintbrush file (.pcx)
Vector Document
Magick Vector Graphics (.mvg)
Scalable Vector Graphics (.svg)
Windows Metafile (.wmf)
AutoCAD Interchange Format (.dxf)
Computer Graphics Metafile (.cgm)
Encapsulated PostScript (.eps)
Enhanced Metafile (.emf)
OpenOffice 1.0 Draw Document (.sxd)
OpenOffice 1.0 Draw Template (.std)
OpenOffice 2.0 Draw Document (.odg)
OpenOffice 2.0 Draw Template (.otg)
OS/2 Metafile (.met)
Text Document
Adobe PostScript (.ps)
AportisDoc Palm DB (.pdb)
HyperText Markup Language (.htm,.html)
Microsoft Word (.doc)
MS Word 2003 XML (.xml)
MS Word template (.dot)
OpenOffice 1.0 Text Document (.sxw)
OpenOffice 1.0 Text Template (.stw)
OpenOffice 2.0 Text Document (.odt)
OpenOffice 2.0 Text Template (.ott)
PocketWord (.psw)
Portable Document Format (.pdf)
Rich Text Format/MS Word (.rtf)
StarWriter (.sdw)
StarWriter Vorlage/Template (.vor)
Text files (.txt)
Website screenshot (.url)
WordPerfect 6 (.wpd)
XHTML (.xhtml)
Data
Data Interchange Format (.dif)
dBASE (.dbf)
Lotus 1-2-3 (.123,.wk1)
Microsoft Excel (.xls)
MS Excel Vorlage/Template (.xlt)
OpenOffice 1.0 calc template (.stc)
OpenOffice 1.0 spreadsheet (.sxc)
OpenOffice 2.0 calc template (.ots)
OpenOffice 2.0 spreadsheet (.ods)
Pocket Excel (.pxl)
Quattro Pro 6.0 (.wb2)
StarCalc (.sdc)
StarCalc Template (.vor)
SYLK (.slk)
Mathematics
MathML (.mml)
OpenOffice 1.0 Math (.sxm)
OpenOffice 2.0 Math (.odf)
StarMath (.smf)
Presentation
Microsoft PowerPoint (.ppt)
Microsoft PowerPoint Template (.pot)
OpenOffice 1.0 Impress (.sxi)
OpenOffice 1.0 Impress Template (.sti)
OpenOffice 2.0 Impress (.odp)
OpenOffice 2.0 Impress Template (.otp)
StarImpress 4.0 (.sdd)
StarImpress 4.0 Template (.vor)
StarImpress 5.0 (.sdd)
StarImpress 5.0 Template (.vor)
Compressed archives
7Z Archive (.7z)
BZ2 compressed archive (.bz2)
BZA compressed archive (.bza)
Data compression (.zip)
Deepfreezer YZ1 archive (.yz1)
GZip compressed archive (.gz)
LHA Archive (.lha,.lzh)
Microsoft CABinet (.cab)
RAR Archive (.rar)
TAR GZip compressed archive (.tgz)
TAR Tape archive (.tar)
Database
Microsoft Access (.mdb)
Microsoft Database (Microsoft Office Access 2007)(.accdb)
Advantage Database Server (.ads)
Lotus Approach data entry & reports(.apr)
Lotus Notes Post Office mail routing database (.box)
Digital Anchor data file (.daf)
DOS Basic (.dos)
Paradox (.db)