What to do?! I had to add those receipts up before an upcoming lengthy trip. Must I buy a new one?

Yeah, I'm old enough as to remember well those old math gadgets. And depending of your true love of the reverend TI-84 Plus, perhaps I have a couple of suggestions to revive such a cherished possession and put it back within the reach of your fingertips without any need of a lengthy trip or have to invest a single penny.

First of all, simply check out this website if you're happy just using an online TI-84 Plus emulator.

But if you're more ambitious and not content with just using it online, then check Wabbitemu website and download the for Windows, Mac OS X, and Android app and in that way you'll have your TI-84 Plus always available without any need of internet access.

But hey, it is also very likely that you will have to download as well the TI-84 Plus ROM here and read some instructions about it.