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File Format
Name Scratch
Extension(s) .sb, .sprite, .sb2, .sb3, .sprite2, .sprite3, .sbx
Released 2006

Scratch is a programming language developed at MIT for use in teaching small children (and adults) programming. Unlike most programming languages which use plain-text source code, the code in Scratch consists of graphical blocks that can be dragged around in the development interface (a free download in early versions, and an online web interface currently) to form programs that manipulate objects on the screen. Shapes, colors, and icons are used to distinguish the different things which can be inserted into a program.

Since the code isn't plain text, the file formats used in saving programs are more complex than for most other programming languages.

Version 2.0 can be run straight from a browser, requiring no installations on your computer.

The Hopscotch app is a similar concept. Google's Project Bloks is an attempt at a physical version of such a language, with movable blocks containing electronics.

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