In 1990, I acquired an AT clone with MS-DOS 4.01 and the DOS shell, the best user interface I've ever seen. The computer came loaded with a program called Eight in One (spreadsheet, word processor, comm software, and five other things I don't recall) which did everything I wanted a computer to do.

Personal computers became mass market devices with the introduction of VisiCalc, the first spreadsheet program. Computers have been built for the mass market and have been usable without coding since the early 1980s.