Cafe book
While El Reg's easy to decipher tiny portable computer flow chart covers most of the basics, some important categories have been forgotten. Gigabyte's website helpfully lists a whole slew of classifications for the wee beasties including MID, UMPC, Touch Note, Booktop, Thin Note and Notebook.
It's as if they handed a focus group slips of paper with 'note', 'book', 'touch', 'lap' and 'top' written on them and then had them pull them of a hat randomly and rearrange them until they got bored. Presumably it was thirsty work and some wag took the one marked 'lap' and scribbled an order for three lattes on it when he popped down to the shops. Hence the M912, one of which I happen to own, is curiously referred to as a 'Cafe Book'.
http://www.gigabyte.com.tw/Products/notebook/Products_List.aspx?NoteBookType=Caf%C3%A9%20Book