Samuel Morland builds a mechanical calculator
Sir Samuel Morland (1625 – 30 December 1695) was an English inventor and mathematician.
He invented a non-decimal adding machine to perform calculations in the British currency of the day, which used pounds, shillings, and pence.
Morland's device is mentioned by Samuel Pepys in his diary, on Saturday 14 March 1667:
...among other things, my Lord had Sir Samuel Morland’s late invention for casting up of sums of L. s. d.;1 which is very pretty, but not very useful.