Steve Silberman revisits the work of Susan Kare, the artist tasked with creating fonts and a friendly interface for Apple:

[S]he mined ideas from everywhere: Asian art history, the geeky gadgets and toys that festooned her teammates’ cubicles, and the glyphs that Depression-era hobos chalked on walls to point the way to a sympathetic household. The symbol on every Apple command key to this day — a stylized castle seen from above — was commonly used in Swedish campgrounds to denote an interesting sightseeing destination. ...