[스크랩] 101 gadgets that changed the world
101 gadgets that changed the world Compiled by Simon Usborne Published: 03 November 2007 Condom: The earliest remains of a condom, which date from 1640, were discovered in Dudley 1. Abacus, AD190 Use of the abacus, with its beads in a rack, was first documented in Han Dynasty China in about AD190, but the word dates to much earlier calculating devices. "Abacus" derives from the Hebrew ibeq, mea..