A shortening of chatterbot, coined in 1994 by computer scientist Michael Mauldin to describe conversational software. Bot is itself short for robot (from Czech robota, 'forced labour', coined by Karel Čapek in 1920). The precursor technology traces to ELIZA (1966), created by Joseph Weizenbaum at MIT, which simulated a therapist by pattern-matching user input — though the word chatbot had not yet been coined. The term gained broad use with the rise of web-based customer service in the late 1990s and exploded in prominence with AI assistants from the 2020s onward.