Thirty years ago, Apple unveiled the Apple Lisa, a pioneering machine that introduced the mouse-driven graphical user interface to a wide audience and opened a new chapter in personal computer history.

The Mac borrowed heavily from the Lisa, and the Mac went on to great things while the Lisa floundered. As a result, it’s tempting to treat the Lisa as merely a footnote in the history of Apple. But as anyone who has used a real Lisa knows, Apple’s first GUI-based computer played host to many distinctive quirks and traits that tend to get overlooked in the history books.