To get the answer, just put a decimal point in the number "50"—my first Microsoft product was MS-DOS 5.0.

But I wasn't using it. Instead, I, like virtually every office worker in the world, was using an IBM PC (or a clone) and ...

To this day I think I'm more comfortable in command line environments on Linux/Unix OS's because of learning early on both MS-DOS and Commodore. If I want to get something done it's still my go-to ...