The TI-84 and newer have USB ports, but the TI-83+ and older require a special cable to connect to a desktop computer. (USB-A or RS-232 on one end, a logic boar

The TI-84 and newer have USB ports, but the TI-83+ and older require a special cable to connect to a desktop computer. (USB-A or RS-232 on one end, a logic board in the middle, and a 3.5mm jack on the calculator end.) I never had one of those, so I entered everything via the keyboard. It must have been an experience very similar to my dad's, who copied BASIC programs out of Compute! magazines into his Atari 800XL in the 80's.