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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
RTS - Extension Details
Date Added: December 12, 2008
File Extension:  .RTS
Description 1: .RTS files refer to streaming media files that utilize Apple QuickTime protocol. These files are played back by the QuickTime Player while the audio/video data are being downloaded from the Net. With .RTS files, webcasts along with other live feeds can be watched by a lot of people at a time.
Description 2: One .RTS extension deals with RealPlayer Streaming Media. It is a streaming media file that comes in the RealNetworks RealPlayer format. RTS files are played in realtime in the clients audiovideo player since data are downloaded straight from the Net. .RM is the popular file extension utilized by most RealPlayer media files.
File Type:   Video file
Mode: Binary
Program(s) to Open:  Mac and Windows: RealNetworks RealPlayer
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