In the early 1950s, computers were the size of buildings and used fragile vacuum tubes that consumed enormous amounts of power and generated a lot of heat. A former IBM Chairman once said, “I think there is a world market for about five computers.” Semiconductor chips were invented by the mid-1950s, which were smaller, faster, more efficient, and performed calculations faster. From there, things paused a bit until the first PC that could sit on your desk was invented....