The computer Steve Jobs demonstrated in the famous 1984 launch was the Macintosh 128K.
Apple introduced the Macintosh on January 24, 1984, at a shareholder meeting in Cupertino, California. Jobs presented the compact computer as a user-friendly alternative to more technical personal computers, emphasizing its graphical interface, mouse, and built-in screen.
The Macintosh was initially known simply as the Macintosh, but the model later became known as the Macintosh 128K because it contained 128 kilobytes of RAM. Its launch followed Apple’s memorable “1984” television advertisement, directed by Ridley Scott.
The Macintosh 128K is sometimes confused with the later Macintosh Plus, which had substantially more memory and arrived in 1986. It is also distinct from the Lisa, an earlier Apple computer that used a graphical interface but targeted a different market.