After a TI-BASIC program is loaded on the graphing calculator, it is able to input the credentials for the LAN and access the internet where all kinds of great calculator resources are available ...

They used the TI-84's link port — typically used to transfer educational programs between calculators — to get internet ...

But if you have one of the supported calculators (TI-83+, TI-83+ SE, TI-84+, or TI-84+SE ... You can use it like normal but you can load load up programs for the environment.