File extensions by JB & VC

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Others

.torrent

It stores metadata (data about data) of folders or archives

.iso

It's a digital replica of a CD

.htm/.html

It's an extension for plain ASCII text

Compressed

tar.gz

It's the combination of Tar and gzip formats

.rar

It's a high quality compressed file because of its encryptation and password protection

.zip

It's a kind of file that it's smaller than the files that it contains

Executable

.msi

It's a software installer

.bat

It's a text file that executes repetitive commands

.exe

It's a executable file format with a reubicable code

Document

.txt

The most basic text format ever

.rtf

It's a file format that can switch between different word processors and operating systems

.odt

It's also an open archive that stores texts

.ods

It's an open archive that stores spreadsheets

.epub

I'ts a document for eBooks

.pdf

It's a document that cannot be edited but can be easily shared

.docx

It's the newer version of doc

.doc

It's a word processing document for microsoft

Image

.xcf

It's the format used by the image editor GIMP

.bmp

It's a map of bits that can store images of 24 bits

.jpg/.jpeg

It's the most coomon extension for the digital cameras.

.png

It's a image file that doesn't lose any quality when it's compressed.

.gif

It's a file extension for moving images and animations

Spreadsheets

.xlsx

It's the newer version of xls which is more compatible with newer spreadsheet programs

.xls

It's the original file format for excel

Presentation

.pptx

It's the same as ppt but the new version

.ppt

It's the standard type of presentation for education

.odp

It processes documents, presentations, spreadsheets and graphics

Audio

.wma

It's a windows compressed audio format

.wav

It's an audio file that stores digital audio waves

.Mid/Midi

Music file that transports saves and opens music sequences

.cda

I'ts an auxiliary file to acces specific audio tracks

.mp3

It's an extension for audio file format

.aup

It's a reference to variuos audio files and the changes applied

Video

.wmv

It's a windows compressed video format

.osp

It saves video editing data

.mpeg/.mpg

It's a popular video format because of its optimal delibery and playback

.mov

It's a video extension that can also support audio and subtitles

.mp4

It's a file extension that stores media format

.avi

It's a file extension to store audio and video at the same time.