Can anyone please explain the difference to me between the TI-84plus and the TI-83plus?

From TI's website:
An enhanced version of the TI-83 Plus, the new TI-84 Plus offers a built-in USB port, 3x the memory of the TI-83 Plus, many preloaded Apps, an improved display, and more! Because the new TI-84 Plus is 100% keystroke-for-keystroke compatible with the TI-83 Plus, integrating it into your classroom will be easy!

With the TI-84 Plus, all students can now share their work by connecting their TI-84 Plus to any TI presentation tools for the whole class to see, fostering a collaborative learning environment.* Plus, a built-in USB port makes data transfer to your computer and between handhelds easier than ever.

key features

13 preloaded Handheld Software Applications (Apps), including Cabri® Jr.
3x the memory of the TI-83 Plus
Compatibility with TI presentation tools*
A built-in USB port with cable
2.5x the speed of the TI-83 Plus
High-contrast display

I am going to ask the most important question anybody can ask:

How much does it cost?

I'm interested in the cost too. If it's not too expensive, I'd like to get one.

I'm a master programmer with the Ti-83+ and 3x more memory sounds great to me.

~Daniel

Putting "TI-84plus" into Google shows lots of retailers with the US price ranging from $105 to $140.

That's not a bad price!

I may have to get one.

Turns out neither of these calculators will work for me for college calculus. I just had to go buy a TI-89. I got the titanium edition. I'm enough of a dweb that I look forward to seeing what this one can do. Daniel, what kinds of programs have you done?

Back to your question loveoflearning.

I've made a 3D animation program that my buddy suggested to me. Really really slow, but fun and basic.

"Graphin3D" a basic 3D graph program, pretty simple.

I've made games for people.

I've only used the Ti-89 once or twice. Haven't had much time to test it. But it has better 3D graph and equation programming.

-theoryman14

You can change the skins so you and your roommate can have different FT looks - would stop confusion of logging in as each other ...

Or even try this thing called logging out. What if your roommate posted as you and did stuff bad enough to get your account banned?

When you're sharing a computer - even when it's with people you know and trust - you should ALWAYS, ALWAYS log out.