Texas Instruments TI-89 Titanium User Manual page 705

I/O Port
A TI-89 Titanium and a TI-89 linked together
Transmitting Variables, Flash Applications, and
Folders
Transmitting variables is a convenient way to share any variable listed on the
screen — functions, programs, etc. You can also transmit Flash applications (Apps) and
folders.
Connectivity
I/O unit-to-unit
cable
TI-89
I/O Port
VAR-LINK
702