The IBM 1401 mainframe (1959) optionally supported pounds/shillings/pence (£sd) arithmetic in hardware. In those days, there were 12 pence in a shilling and 20

The IBM 1401 mainframe (1959) optionally supported pounds/shillings/pence (£sd) arithmetic in hardware. In those days, there were 12 pence in a shilling and 20 shillings in a pound, so arithmetic with UK money was non-trivial. (This wasn't even microcode; this was literally boards full of transistors to add, subtract, multiply, divide, and format currency values.)