(Commonly just "laptop") A portable {personal computer} of a size suitable to rest comfortably on one' s legs.A laptop is smaller than a "luggable" (portable, but not comfortably) but bigger than a "palmtop" (easily carried in one hand or a shirt pocket).Toshiba were one of the first companies to produce laptops, in about 1989.[First example?Date?Difference from "notebook"?](1994-12-21)