[This post is part of “A Bicycle for the Mind.” The complete series can be found here.] From 1975 through early 1977, the use of personal computers remained almost exclusively the province of hobbyists who loved to play with computers and found them inherently fascinating. When BYTE magazine came out with its premier issue in 1975, the cover called computers “the world’s greatest toy.” When Bill Gates wrote about the value of good software in the spring of 1976, he framed his argument in terms o...