On January 24, 1984, the Macintosh went on sale with a retail price of $2,495. It came bundled with two applications designed to show off its interface: MacWrite and MacPaint. On the same day, an emotional Jobs introduced the computer to a wildly enthusiastic audience at Apple's annual shareholders meeting held in the Flint Auditorium; Macintosh engineer Andy Hertzfeld described the scene as "pandemonium". Jobs had directed the development of the Macintosh since 1981, when he took over the project from early Apple employee Jef Raskin, who conceived the computer (Wozniak, who had crucial influence over the initial design and development of the program with Raskin, was on leave during this time due to an airplane crash earlier that year). The Macintosh was based on The Lisa (and Xerox PARC's mouse-driven graphical user interface), and it was widely acclaimed by the media with strong initial sales supporting it. However, the computer's slow processing speed and limited range of available software led to a rapid sales decline in the second half of 1984.