I'm sure this will get downvoted since its not PC (pun intended), but I feel like the title should read "Two Bored 1970's Housewives, and an engineer Husband, Helped Create the PC Industry." The wives had the time and desire, and the husband had the skill and idea[1], just not the time or risk tolerance. I don't see how these can be separated, considering he was the Chief Engineer and created most of the products too. [2]
[1] "Bob Harp’s memory board worked well, and he recognized that it could serve as a lucrative commercial product. Lacking the time and resources to commercialize it, he put it on the back burner for almost a year. But in 1976, when his wife and Ely were trying to hatch a business, he offered his Altair memory board as a potential product".
[2] "Losing the engineer who had designed almost all of its hardware products since 1976 was a huge blow for Vector."