Reconstructing OPL: Joseph Weizenbaum's Online Programming Language
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Paolo Amoroso
Mar 1, 2026, 5:15:01 AMMar 1
to Medley Interlisp core
Rupert Lane of the Time Reshared blog published the post Reconstructing OPL: Joseph Weizenbaum's Online Programming Language.
Based on a printout of source code found among Weizenbaum's papers archived by MIT Libraries, I have reconstructed the language so it can live again for the first time in nearly sixty years on a IBM 7094 emulator running CTSS.
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