Computer Science 1032A/B Lecture Notes - Lecture 4: Vertical Market, Cloud Computing, Cathode Ray

• School: Western University
• Department: Computer Science
• Course: Computer Science 1032A/B
• Professor: Louis Magguilli

Document Summary

Transistor: developed in 1947, originally designed to be airborne radar. Processing ie. cpu (brain)(hertz: speed or number of cycles per second a computer works at) Memory swapping: cpu doesn"t have enough memory so it will remove something to make room. Volatile: content is lost when power goes off (cache main memory) Nonvolatile: contents survive when power is shut off. (usb) Server farm: a large collection of computers that coordinate all activities. Grid computing: several computers used to address a single problem at the same time. Windows (business) mac linux (open source community) unix (scientific engineering) When buying an operating software what is actually bought is a license. Horizontal market application: software provides capabilities common across all industries. Vertical market application: (can be altered or customized) serves the need of a specific industry. Rom = read-only memory r = record data once rw = rewritable. Two types: crts (cathode ray tubes) big and bulky lcds (liquid crystal display) slimmer.