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Slate is a prototype-based object-oriented programming language created by Steve Strassmann in the early 1990s. It is described as "Smalltalk without classes" and was written to be a more lightweight and minimalistic alternative to Smalltalk. Slate allows programmers to create new objects using the behaviors of existing ones, encouraging a compositional programming style. The language uses an actor model for managing concurrency and parallelism, which allows for independent objects with their own thread of control. Slate's syntax is minimalist and designed for expressiveness, making it easy to use both at an interactive prompt or inside a file where built systems can be written in it. While not widely used in commercial applications, Slate has inspired other languages such as Self and Io with its unique take on object-oriented programming principles.

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