<p>You need the TI Connect software, downloadable here.</p>
<p>TI</a> Connect & App Instructions for Windows® by Texas Instruments -US and Canada</p>
<p>You also need a USB cable. If you brought a new calculator, it came with it. If not, you can pick one up at Circuit City. Note that, as far as I remember, only the TI-84 uses the USB cable... I think you need one of the older cables to connect to the TI-83.</p>