High Quality Content by WIKIPEDIA articles! A portable computer is a computer that is designed to be moved from one place to another and includes a display and keyboard. Portable computers, by their nature, are microcomputers. Portable computers, because of their size, are also commonly known as 'Lunchbox' or 'Luggable' computers. Can also be called a 'Portable Workstation' or 'Portable PC'. The principle advantage of a portable computer versus a laptop or other mobile computer is the use of standard motherboards or backplanes providing plug-in slots for add-in cards. This allows mission specific cards such as test, A/D, or communication protocol (IEEE-488, 1553) to be installed. Portable computers also provide for more disk storage by using standard 3-1/2" drives and providing for multiple drives.