The original ABC language, Python's predecessor (1991)

Summary

The original ABC programming language (CWI) History ABC was Python's most direct predecessor; I worked on it from around 1983-1986. I downloaded these sources from cwi.nl, specifically the abc-unix tarball. Another copy of the ABC sources lives in Luciano Ramalho's GitHub. I hope one day to compare the two trees and unify them. Most files have 1991 as their latest modification time in the tar ball; a few have 1996 or 2021. Building The old README file has build instructions. The current sources assume a 32-bit system where int and pointers have the same size. I hope to eventually upgrade the source code to work on 64-bit systems too (where int is 32 bits and pointers are 64 bits). Licence CWI never put a license on ABC, but it says: Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1988-2011. I'll try to negotiate with Steven Pemberton eventually (hopefully MIT). Authors Eddy Boeve, Frank van Dijk, Leo Geurts, Timo Krijnen, Lambert Meertens, Steven Pemberton, Guido van Rossum. References