dixen (Unstopable Lover + The Bachelor): 500 B.C. - the Chinese invented the ABACUS, considered to be the first computer device, which can perform simple addition and subtraction operations. *
19-01-09 - 07:16:04

dixen (Unstopable Lover + The Bachelor): 1617 - John Napier, a Scottish mathematician, invented the NAPIER'S BONE, a table of logarithms made of ivory *
19-01-09 - 07:18:04

dixen (Unstopable Lover + The Bachelor): 1630 - William Oughtred, an English mathematician, invented the SLIDE RULE, a device made of wood with movable scales arrange to slide opposite each other. *
19-01-09 - 07:20:42

dixen (Unstopable Lover + The Bachelor): 1642 - Blaise Pascal, a French mathematician, invented the PASCALINE, the first mechanical calculating machine. *
19-01-09 - 07:23:23