This mailing list will run on any Commodore 6502 machine with any memory size.
It will build a list and save it onto a cassette tape for recall. VIC20 is the machine this program was designed for, but it runs on the 40 column PET as well as the 8032. Capacity ranges from 21 names on a 3.5K VIC to 120 names on a VIC with an 8K expander, to 359 names with 32K machines. If you have a list and the 19th address in it changes you can recall just that one and change it.