I picked up "Future Mind" by Edward Lias, (c)1982 at UCSB, and the first skimming shows it to be a pretty interesting book. Things I found interesting were in the chapter titled "How Many Would You Like?", that included marketing research type information. A couple of examples are Small Business Computer Census and Minicomputer Census for 1980 that give the number of installations for a number of computer vendors. Included are some that are not well known, Modular Micro, Artronix, Bytronix, New England Digital Corp., etc. One of the charts was a table showing the speed in operations per second for about 100 computers. This is a pretty expensive book, but well worth the $1.00 or so that a number of online bookstores are selling it for.