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Also thanks for mentioning Clascal, I wasn't even aware of it. Also fascinating:

https://en.wikipedia.org/wiki/Clascal

https://bitsavers.org/pdf/apple/lisa/toolkit_3.0/Package_2_E...

There is also a "Clascal Reference Manual for the Lisa" (1983) available on the web, and Larry Tesler talked about it (https://youtu.be/OloLXE4I5fw?t=7665). They needed an OO language, but Smalltalk was too slow, so they came up with Clascal.

Some years later Apple joined with Wirth to co-design Object Pascal.

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