• takes two values (1,2,4,8 bytes), treats as sequence of bits
• performs logical AND on each corresponding pair of bits
• result contains same number of bits as inputs

  00100111           AND | 0  1
& 11100011           ----|-----
  --------             0 | 0  0
  00100011             1 | 0  1

Used for e.g. checking whether a bit is set