BITS, NIBBLES AND BYTES - the computer arithmetic - Binary

There are only two values - On or Off, like a lightswitch:

                       0  ...........................  represents no value present  ......................... Off
                       1  ...........................  represents a value present  ........................... On

BIT   -  A single character of a language, having just two characters - either of the binary digits O or I

NIBBLE    -  This is not a common term.  It is a group of 4 bits and 2 Nibbles will equal 1 Byte

BYTE

• A combination of 8 binary digits.  Each byte represents a single character or letter.
  
• The capital letter A = 01000001
  
• The space occupied by a single character in a computer store
  

KILOBYTE   ..............  KB

• One kilobyte is 1,024 bytes or characters
  
• Approximately equal to one A4 page of double-spaced text
  

MEGABYTE   ............  MB

• One megabyte is 1.024 KB
  
• Approximately equal to one reasonably sized book
  

GIGABYTE ................  GB

• One gigabyte is 1,024 MB
  
• Approximately equal to a shelf of books in a library
  

TERABYTE  ............... TB

• One terabyte is 1,024 GB
• Approximately equal to one reasonably sized library