Computer Science 1033A/B Lecture 3: Lec3 - Introduction to Graphics and Binary Code

• School: Western University
• Department: Computer Science
• Course: Computer Science 1033A/B
• Professor: Laura Reid

Document Summary

When printed, 72 pt font = 1 inch height. Never use underlining on a website (hyperlinks are an exception) Contains 16 characters: 0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f in that order of strength. 6 spots for colour variation first 2 = red. Middle 2 = green last 2 = blue if all colours are equal (ex. Computer only speaks in binary (all 0"s and 1"s) Each 1 or 0 is called a bit. 1024 bits (or 128 bytes) = 1 kilobyte (2^10) *never refer to anything as bits because they are so small, instead use a byte and add 0"s where needed. Ascii code represents letters in binary (for english) Only needed enough for all the letters, one digit numbers and regular symbols (1 byte) Once other languages became available on a computer, they needed more symbols, so they created a new code unicode (uses 2 bytes) Computer understand binary by using electric pulses. High voltage shock = 1 low voltage shock = 0.