From about 1983 to 1989 (10th grade through college), I worked part-time for CONDUIT Educational Software. Much of my work was writing "ampersand commands" to extend Applesoft BASIC for the Apple II. When I left, they gave me this cool T-shirt, which is a cool inside joke showing how Applesoft would display a function call to a module named LYONS with a parameter of DAVE.

I believe Steve Hirst masterminded the shirt design.

&LYONS(DAVE) T-shirt