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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:
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RBT - Extension Details
Date Added: March 11, 2008
File Extension:  .RBT
Description 1: .RBT is a file extension associated with a program that was written for a particular LEGO MINDSTORMS NXT robot using the programming system known as NXTG. The RBT files include functions defining the actions and movements of the robot. Picking up a certain object is one example of such actions or movements.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Mac and Windows: LEGO MINDSTORMS NXT and LEGO MINDSTORMS Education NXT
Common:
Extension: