I don't know what made me think of this, but my original Commodore VIC-20 was my first BYOD (bring your own device). Sure it only had 5K of memory, practically no "business" software and a painfully slow tape drive, but it was a real computer and had a pretty good keyboard. I used it for light word processing, some financial analysis and calculating amortization tables for "alternative" mortgages. The California Housing Finance Agency used my calculations for some of their "new" loan products 33 years ago. What was your first BYOD?