Carmack also was a programmer at Softdisk. It is detailed in Masters of Doom. If memory serves me well, at some point, he and other programmers were "unofficial

Carmack also was a programmer at Softdisk. It is detailed in Masters of Doom. If memory serves me well, at some point, he and other programmers were "unofficially borrowing" the company equipment during the weekends, then bringing it back early on Monday morning. They were caught at the end :-)