My parents' 80286 IBM PS/2 came with MS DOS 4.0 and a manual. I worked my way through the manual, trying every command. One day I tried RESTORE. This ended p

My parents' 80286 IBM PS/2 came with MS DOS 4.0 and a manual. I worked my way through the manual, trying every command. One day I tried RESTORE. This ended poorly, since it overwrote the entire contents of the 20MB hard drive. But on the plus side, I learned how to install an operating system that day, as I installed DOS again from the floppies. Fortunately, we still kept all of our files on floppies at the time, so nothing important was lost. At any rate, that machine also had EDLIN and BASICA, and that was the start of my programming career. I didn't have any books on BASIC, and the manual was pretty scant when it came to information about BASIC. But I did have a friend who was into BASIC, and he pointed me in the right direction a few times.