With Aaron's additions... I. TI-83 II. TI-83+ 1. Archived programs cannot be accessed. 2. You cannot delete PRG files from a BASIC program. III. TI-85 IV. TI-86 V. TI-89 1. In the Toolbar...EndTbar section, on the Title lines, you can define a 16x16 PIC file without quotes and it will be displayed instead of a string. VI. TI-92 VII. TI-92+ 1. Most things that work on the TI-89 work on the 92+.