Articles

Bitmap Graphics
Images are displayed on a computer monitor as bitmaps. A bitmap is a grid of pixels. The pixels may be represented using different numbers of bits which correspond to the number of colours present in the available range.

Information Coding Systems
The problem of storing text in a digital form predates the computer era. A variety of different digital coding schemes have been used from prehistoric times (ie: beacon fires) to relay predetermined messages. Other examples include Morse code and semaphore systems.

Number Bases
The number base of a number is the number of unique digits possible in that number. eg:

Number Types
Natural numbers
Numbers that are used by people every day for counting and ordering: This is called decimal or base10. With a single digit, the largest value that can be represented is 9. To create large numbers we add a new digit to to the left to give the numbers 10…99 and so on.

Number Systems
Binary examples The 2 stands for the number base. In this case binary.