On recreating the lost SDK for a 42-year-old operating system: VisiCorp Visi On

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Dec 4, 2025, 6:16:09 AM (12 days ago) Dec 4

to Medley Interlisp core

Nina Kalinina reverse-engineered enough of VisiCorp Visi On to recreate an SDK and develop a basic GUI application. A remarkable feat of software preservation. Her report on the project even features a cameo of Interlisp: On recreating the lost SDK for a 42-year-old operating system: VisiCorp Visi On.

Do you know someone who knows someone who worked on Visi On?

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