Each binary digit in a number is reversed to allow both negative and positive numbers to be represented
Two's complement
Each binary digit is reversed and 1 is added in right-most position to produce another method of representing positive and negative numbers
Sign and magnitude
Binary number system where left-most bit is used to represent the sign (0 = + and 1 = –); the remaining bits represent the binary value
Hexadecimal
A number system based on the value 16 (uses the denary digits 0 to 9 and the letters A to F)
Memory dump
Contents of a computer memory output to screen or printer
Binary-coded decimal (BCD)
Number system that uses 4 bits to represent each denary digit
ASCII code
Coding system for all the characters on a keyboard and control codes
Character set
A list of characters that have been defined by computer hardware and software. It is necessary to have a method of coding, so that the computer can understand human characters
Unicode
Coding system which represents all the languages of the world (first 128 characters are the same as ASCII code)
