ITEC 1000 Study Guide - Final Guide: Ebcdic, Usb, Scsi

• School: York University
• Department: Information Technology
• Course: ITEC 1000
• Professor: Peter Khaiter

Document Summary

Proprietary formats: unique to a product or company, e. g. , microsoft word, word perfect. Standards (evolve in two ways): proprietary formats become de facto standards (e. g. , adobe postscript) Invented by an international standard organization (e. g. , motion pictures. Characters (r, t), number digits (09), punctuation (!, ;), special purpose characters ($, &) Four codes/standards to represent letters and numbers: bcd (binary-coded decimal, unicode, ascii (american standard code for information interchange, ebcdic (extended binary coded decimal interchange code) Developed by ansi (american national standards institute) 8th bit is unused (or used for a parity bit or to indicate extended character set) Two general types of codes: 95 are printing codes (displayable on a console, 33 are control codes (control features of the console or communications channel) Ascii: latin alphabet, arabic numerals, standard punctuation characters, plus small set of accents and other european special characters (latin-i. Magnetic stripe reader: alphanumeric data from credit cards. Digitized audio recording common but conversion to alphanumeric data difficult.