ITEC 1000 Lecture Notes - Lecture 2: Random-Access Memory, Liquid-Crystal Display, Supply Chain
31 Mar 2013
School
Department
Course
Professor
Document Summary
Centreal processing unit - cpu: arithemtic/ logic unit ,control unit. Arithmetic/ logic unit alu: perfroms math calculationa and logical comparisons. Control unit accesses program instructions, decodes, coordinates data, out of alu, sotrage prim and secondary. Clock speed electroic pulse, predetermined rate that affects machine life: measuered in megaherts and gigaherts. Physical characteristics of the cpu are collection of digital circuits imprinted on silicon wafers of chips. Types of memory: ram - random access memory - temporary and volatile, rom - read only memory - non volatile, provides permanent storage for data and instructions that do not change. Input devices personal comp input devices - data entry text charchter basic commands speech regonition technolgy digital cameras: devices that used to input data, magnetic stripe card touch sensitive screens. Computer system types: can range from desktop or smaller portable computers to massive supercomputers that require housins in larger rooms.
