A
laptop computer (also known as
notebook computer) is a small mobile
personal computer, usually weighing around from 1 to 3 kilograms or 2 to 7 pounds. Laptops are capable of much of what their desktop counterparts can do. They have many of the same components, but they are miniaturized. Laptops usually have
LCDs for their screens and smaller
SODIMM[?] (Small Outline
DIMM) chips for their
RAM. They often have a
touchpad[?] or a
trackpoint[?], but an additional
computer mouse or
keyboard can be attached.