PLS 21 Lecture 15: PLS Lect 15
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PLS 21 Full Course Notes
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Document Summary
Computer hardware: refers to the physical components, not one device but a system of many devices, major types of components include, central processing unit, main memory, secondary storage devices. Fetches instructions from main memory: carries out the operations commanded by the instructions, each instruction produces some outcome, cpu gets instructions from a program, a program is an entire sequence of instructions. Binary number - a sequence of 1s and 0s. Input devices: any type of device that provides data to a computer from the outside world, keyboard, mouse, scanner. Output devices: any type of device that provides data from a computer to the outside world, examples of output data, a printed report, an image such as a picture, a sound, common output devices include, monitor, printer. Software: the programs that run on a computer, two major categories, operating system, controls the processes within the computer, manages the computer"s hardware devices, application software.
