Fire in the Valley is the best computer history book I've read. It covers the very early history of the Altair (Hardware) and Bill Gates writing a version of Basic for it (Software). I would say it stops in the 90s since I've only read the first edition but apparently there are two more editions out now that cover events through Steve Jobs death. I think I'm due for a rereading.
https://www.amazon.com/gp/aw/d/1937785769/ref=dp_ob_neva_mob...