By Michael Sauers
Know Your Internet File Extensions
When transferring files on the Internet, whether via the web or e-mail, you'll come across files
with many different extensions. Some will be familiar, such as .exe for an executable program;
some will not. Here is a list of file extensions specific to the Internet and what those extensions
should mean to you.
.aif/.aiff An audio file.
.asp Active Server Page: A standard developed by Microsoft that allows the content
of a web page to be customized for the user viewing it.
.au An audio file originally developed for UNIX.
.avi A video file format developed by Microsoft.
.gif Graphics Interchange Format: A graphics file format developed by
Compuserve.
.gz A file compressed with the gzip program.
.jpg/.jpeg A graphics file format developed by the Joint Photographics Experts group.
.la/.lma Netscape Packetized Audio: An audio file.
.mid/.midi Musical Instruments Digital Interface: An audio file format.
.mov Quicktime video file format developed by Apple.
.mpg/.mpeg A video file format developed by the Motion Picture Experts Group.
.pdf Adobe's Portable Document Format, otherwise know as an Acrobat file.
.ram/.rpm RealNetwork's Real Audio or Real Video files that tell your browser the location
on the Internet from which to download streaming audio or video content.
.shtml Indicates a web page uses server-side includes (directing the web server to give
an html file special treatment, perhaps by executing a script or including a file):
A technology similar to and predating .asp.
.tar.Z A file compressed using the UNIX tar and compress commands.
.vcf A vCard: Usually attached to an e-mail message. An online business card sent
with e-mail that allows the receiver to automatically import the senders
information into an address book or Personal Information Manager (PIM).
.wav An audio file format developed by Microsoft.
.wrl A VRML file or Virtual Reality Modeling Language: Similar to HTML but
allows for the creation of 3D multimedia "worlds."
.zip A compressed file, the most common Windows-based compression format.
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