The Apple Lisa PC was Apple's first personal computer with a graphical user interface (GUI), released in 1983. It cost $9,995 and was intended to be a more modern version of the Apple II for business users. Although it introduced innovations like the mouse and GUI, the Lisa ultimately failed commercially due to high production costs. However, it proved to be an important technological advancement and helped lay the foundations for the successful Macintosh computer that later established Apple as a leader in personal computing.