Strand 3: IT Systems

3.1 Hardware

Charecter Encoding ASCII


Character Encoding ASCII: Detailed Description


  • The acronym ASCII stands for American Standard Code for Information Interchange.
  • There are 128 standard ASCII codes and each have 8 digit numbers only running from 0-1 as an example: A is represented by the code 01000001 and the letter B is represented by the code 01000010
  • Computer memory saves all data in digital form and there is no way to store charecters directly.
  • Each Charecter has its own digital code equivilant.

As the world shrinks the information has to grow so our 256 unique characters simply are not enough. ASCII code is too limited to house Chinese, Greek, Hebrew, Japanese, Arabic and other languages. Now that these languages are limited to house the computer industry in going ahead with Unicode a coding system that supports more that 100,000 unique characters, more than all of the worlds major languages. A group of bits can also represent colours, sounds, and quantitative measurements from the environment and any other information that needs processing.

The Alphabet in Binary Code

A ||01000001 || a || 01100001

B ||01000010 || b || 01100010

C ||01000011 || c || 01100011

D || 01000100|| d || 01100100

E || 01000101 || e || 01100101

F || 01000110 || f || 01100110

G || 01000111 || g ||01100111

H || 01001000 || h ||01101000

I || 01001001 || i ||01101001

J || 01001010 || j ||01101010

K || 01001011 || k ||01101011

L || 01001100 || l || 01101100

M || 01001101 || m || 01101101

N || 01001110 || n ||01101110

O || 01001111 || o || 01101111

P || 01010000 || p || 01110000

Q || 01010001 || q ||01110001

R || 01010010 || r ||01110010

S || 01010011 || s ||01110011

T || 01010100 || t ||01110100

U || 01010101 || u ||01110101

V || 01010110 || v ||01110110

W || 01010111 || w ||01110111

X || 01011000 || x ||01111000

Y || 01011001 || y ||01111001

Z || 01011010 || z ||01111010