Dear Friend,The first personal computers were home-built by electronics hobbyists.
When Apple, IBM and others began selling ready-made systems to "normal" folk, most buyers never considered opening the case, even to look, much less make changes.
That was roughly 25 years ago - one human generation, but more than a dozen generations for computers.
By the second decade of the personal computer age, computer stores were selling hard drives, memory upgrades, sound and video cards and other components to an increasingly large segment of the home computer market who wanted to make their PC "more" than what the manufacturer sold them.
Today, such parts can be found in any office supply or general merchandise store - even some supermarkets and drug st
