Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. TOM was an object-oriented programming language developed in the 1990s that built on the lessons learned from Objective-C. The main purpose of TOM was to allow for "unplanned reuse" of code via a well-developed extension mechanism. This concept was introduced seemingly by accident in Objective-C and later proved to be of wide use, and was applied aggressively in TOM. The primary changes in TOM are the addition of multiple inheritance, tuples as a first-class part of the language, cleaner syntax, free of the C requirements for header files and pre-compiler commands, and the ability to use categories (the re-use mechanism) to include anything.

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