If everything your mom does is online, chromebooks = awesome. Bonus points if she already has a GMail/Google account and can start using all of their products immediately, as the chromebooks run Google products better, though they can run pretty much everything else online. If she has any specific software that is offline only, than she needs a notebook or a netbook (though I'd still look for an online alternative). The big difference between those two is horsepower and size - netbooks are tiny and as cost effective as chromebooks, but can be pretty week; notebooks can be any size, and can be as powerful as you can afford.
Want to improve your game? The best thing to buy is more paint and more field fees.
I can't dumb it down to your level because I'm scared of heights.
A shark is an animal that dies if it stops moving. My feedback