The aim of this lecture is to present on Computer Systems. This is a system of interconnected computers that share a central storage system and various peripheral devices such as a printers, scanners, or routers. Computer systems will include the computer along with any software and peripheral devices that are necessary to make the computer function. Every computer system, for example, requires an operating system. Each computer connected to the system can operate independently, but has the ability to communicate with other external devices and computers.