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Below, you can see the preview of the Computer Languages History (move on the white zone to get a bigger image): If you want to print this timeline, you can freely download one of the following PDF files: There is only 50 languages listed in my chart, if you don't find "your" language, see The Language List of Bill Kinnersley (he has listed more than 2500 languages).
The list of programming languages is comprised of all languages implemented in a compiler or an interpreter, in alphabetical order. In addition, historical languages with no compiler, but that may have influenced design of further work are included also, provided that the author of the further language has made a verifiable reference to them.