umpcs (ultra mobile pcs)

does anyone know of / have umpcs? 

i've been interested in getting one for the coming fall semester, but i'm not sure if it'll be a good investment. i'm planning to just use it as a file manager (i'm going back to taking notes on paper) and review my work for classes, maybe do some light browsing... view materials in class if needed...

i really don't want to lug around my main laptop anymore (barely do anything with it, also a distraction from studying sometimes), but i really don't want to rely more on my phone, if that makes sense. and if it adds more context, i'm an english major. so i don't think i'd need a powerful computer that much in class...? 

idk. now i'm thinking i should just get a pda. i'd really love some advice.

I don't have a umpc because honestly they're annoying and unreliable and a million other reasons butttt may i suggest an e-reader? you can go over textbooks, you're an English major so surely you read a lot AND they're cheaper and lighter and can have as many or as little features as you want, some you can't even exist the main software to other apps and some come with pens and an app store access