Computer Technology: From Punch Cards to Supercomputers

Computer Technology: From Punch Cards to Supercomputers — page 1
Early Computers Today computers are everywhere They are in toys cars and smartphones Computers started out as machines for counting things Some were used thousands of years ago Abacus The abacus was used in ancient China Each bead stood for a different number You put beads in rows to add up The abacus was invented 2,500 years ago 4