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Binary Code

A two state electronic device that is made of two digits.

Advantages of Binary

Arithmitic calculations are easier and needs only two voltages.

Units

Bit, Byte, Kilobyte, Megabyte, Gigabyte, Terabyte, etc

Floating-Point Representation

Made up of the Mantissa and the Exponent

Advantage of Floating-Point Representation

A few number of Bits needed.

Disadvantage Of Floating-Point Representation

Not much accuracy, rounded to a set number of figures.

Text - Control Characters

Non-printable charaters, like enter or space

Text - Character Set

Printable Characters, such as A, B, C or +, -, ?

Text

There is a unique binary code for each characters.

Bitmap Graphics

Stores data as pixels.

Bitmap Graphics - Resolution

The number of pixels in an area. There is high resolution, which is smaller pixels, and low resolution, and that is bigger pixels.

Bitmap Graphics - Bit Depth

The number of pixels used to encode the colour of each pixel.

Storage Calculations

The number of Pixels required to store colour