"the technique Atari used to simulate colors on its first arcade games", Wozniak found a way of putting colors into the NTSC system by using a chip, while colors in the PAL system are achieved by "accident" when a dot occurs on a line, and he says that to this day he has no idea how it works. During the design stage, Jobs argued that the Apple II should have two expansion slots, while Wozniak wanted eight. After a heated argument, during which Wozniak threatened that Jobs should "go get himself another computer", they decided to go with eight slots. Jobs and Wozniak introduced the Apple II at the April 1977 West Coast Computer Faire. Wozniak's first article about the Apple II was in Byte magazine in May 1977. It became one of the first highly successful mass-produced personal computers in the world. Wozniak also designed the Disk II floppy disk drive, released in 1978 specifically for use with the Apple II series to replace the slower cassette tape storage. In 1980, Apple went public to instant and significant financial profitability, making Jobs and Wozniak both millionaires. The Apple II's intended successor, the Apple III, released the same year, was a commercial failure and was discontinued in 1984. According to Wozniak, the Apple III "had 100 percent hardware failures", and that the primary reason for these failures was that the system was designed by Apple's marketing department, unlike Apple's previous engineering-driven projects. During the early design and development phase of the original Macintosh, Wozniak had a heavy influence over the project along with Jef Raskin, who conceived the computer. Later named the "Macintosh 128k", it would become the first mass-market personal computer featuring an integral graphical user interface and mouse. The Macintosh would also go on to introduce the desktop publishing industry with the addition of the Apple LaserWriter, the first laser printer to feature vector graphics. In a 2013 interview, Wozniak said that in 1981, "Steve [Jobs] really took over the project when I had a plane crash and wasn't there." Plane crash and temporary leave from Apple On February 7, 1981, the Beechcraft Bonanza A36TC which Wozniak was piloting (and not qualified to operate) crashed soon after takeoff from the Sky Park Airport in Scotts Valley, California. The airplane stalled while climbing, then bounced down the runway, broke through two fences, and crashed into an embankment. Wozniak and