File Extensions-What are they?

The following is a list of some of the most popular "file extensions" you will see on your computer and or receive in an email...  File Extensions tell the computer the specific type of "file" something is...    Note if any file extension has an "x" at the end of it, it is an indication it was done in one of the Office 2007, 2010, 2013 programs... (ie.e docx; xlsx, pptx)
Extension	Example File Type
zip	Zip archive
pdf	PDF Document
mp3	MP3 Audio File
jpg	JPEG Image
exe	Executable file
wmv	Windows Media Video
doc	Microsoft Word Document
ppt	Microsoft PowerPoint Presentation
mpg	MPEG-1 Video
tif	Tagged Image File Format
wav	Waveform Audio Format
mov	QuickTime
psd	Photoshop Document
wma	Windows Media Audio
xls	Microsoft Excel spreadsheet
mp4	MPEG-4 Part 14
txt	Plain text file
bmp	Windows bitmap
pps	PowerPoint Show
aif	Audio Interchange File
pub	Microsoft Publisher
gif	GIF (Graphics Interchange Format) Image
qbb	QuickBooks backup file
dat	Data
rm	RealMedia
mdb	Microsoft Access
htm	Hypertext Markup Language (HTML)
flv	Flash video
wpd	WordPerfect Document
rtf	Rich Text Format
jpeg	JPEG image
html	Hypertext Markup Language (HTML) document
pst	Microsoft Personal STorage
ttf	TrueType font
mswmm	Windows Movie Maker Project File
eml	E-mail message
bat	Batch file
wps	Text document; MS Works