And making sure you have the right AT commands to dial up a bulletin board service.
True that. And at the time I was ahead of the game writing code in C+ (pre C++, showing my age here), dBase, Pascal, and some hobby programming in QBasic. I’m spoiled today with modern IDE’s doing color syntaxing, code filling, and dragging DB objects onto a form to connect to a database. That’s not even getting into DOS not letting you do multi-threading like I do with my C# app today in Windows to download market data with one thread while it calculates SMA’s and EMA’s in another thread and generate a report with another thread, all maintained in a SQL Server database running on the same laptop. If we were still in the DOS days I’d have to buy market data from Bloomberg (how he made his billions) instead of doing it all on my own on one laptop.