Computer hardware and maintenance pdf

Please forward this error screen to sharedip-10718051234. Computer hardware and maintenance pdf other uses, see Hardware. Computer hardware is the physical parts or components of a computer, such as the monitor, keyboard, computer data storage, graphic card, sound card and motherboard.

By contrast, software is instructions that can be stored and ran by hardware. Hardware is directed by the software to execute any command or instruction. A combination of hardware and software forms a usable computing system. The template for all modern computers is the Von Neumann architecture, detailed in a 1945 paper by Hungarian mathematician John von Neumann.

This describes a design architecture for an electronic digital computer with subdivisions of a processing unit consisting of an arithmetic logic unit and processor registers, a control unit containing an instruction register and program counter, a memory to store both data and instructions, external mass storage, and input and output mechanisms. The meaning of the term has evolved to mean a stored-program computer in which an instruction fetch and a data operation cannot occur at the same time because they share a common bus.