I/O Port

Stands for Input / Output port. This is the round jack used to connect the calculators to each other, a computer, or CBL / CBR devices. On more recent calculators, there is also a Mini AB type USB port for the same purpose.

TI-89 Dummies

Quotable Quotes:

"The only dummies are those who do not make use of their Dummies books. They are all well written by knowledgable professionals who have a sense of humor."

"I think that these are great books and you should get it right now if you own a Graphing Calculator."