Data Representation

• Bits are the smallest measure of data.
• A byte is big enough to store one character.
• Bit (b) = A single binary digit.
• Nibble = 4 bits.
• Byte (B) = 8 bits.
• Kilobyte (kB) = 1000 bytes.
• Megabytes (MB) = 1000 kilobytes.
• Gigabyte (GB) = 1000 megabytes.
• Terabyte (TB) = 1000 gigabytes.
• Petabytes (PB) = 1000 terabytes.
• Ashley has downloaded some images to her computer. Each image is 300 kilobytes.

  To work out the amount of bits:

  1. Convert to bytes by multiplying by 1000.
  2. There are 8 bits in a byte, so multiply by 8.