Kare created several fonts for the system, all given names for world-class cities. There's also a little more to this story, courtesy of Susan Kare herself at

Kare created several fonts for the system, all given names for world-class cities. There's also a little more to this story, courtesy of Susan Kare herself at https://www.folklore.org/StoryView.py?story=World_Class_Cities.txt https://www.folklore.org/StoryView.py?story=World_Class_Citi... The fonts were named after commuter train stops in Philadelphia until Jobs decided they should be renamed after "world class cities".