Back in the mid--1980's when I was in high school I attended a local computer user group with some regularity. It was there that I learned about IBM computers and MS-DOS 2.2 From there it was the C: prompt and batch files. This led me to my first paying computer consulting jobs. One was at Cor-IT Sales, a power tool and fastener company. They had 1 computer and no one who knew how to make it work.