ELIZA for DOS

ELIZA, created in the mid-1960s by Joseph Weizenbaum at MIT, was one of the first computer programs to simulate human conversation. Designed as a natural language processing demonstration, ELIZA used pattern matching and substitution to respond to user input, giving the illusion of understanding. Its most famous script, DOCTOR, mimicked a Rogerian psychotherapist, often turning users’ statements into reflective questions. ELIZA became a landmark in artificial intelligence history.
The DOS version of ELIZA appeared in the 1980s and early 1990s, when hobbyists and small developers ported classic text-based programs to personal computers.