Laptops : A laptop computer is a portable computer equipped with a flat display screen and weighs about 2-11 pounds. The two principal types of laptop computers are notebooks and sub notebooks, a category sometimes called ultralights.
A notebook computer is portable computer that weighs 4-9 pounds and is roughly the size of a thick notebook . Notebook PCs can easily be tucked into a briefcase or backpack or simply under your arm . It is a small portable computer, small enough that it can sit on your lap. Nowadays. notebook computers are more frequently called laptop computers. though technically laptops are smaller in size than notebooks.