Forbes Magazine has determined the 20 most important tools of all time.
No. 1 The Knife
No. 2 The Abacus
No. 3 The Compass
No. 4: The Pencil
No. 5: The Harness
No. 6: The Scythe
No. 7: The Rifle
No. 8: The Sword
No. 9: Eyeglasses
No. 10: The Saw
No. 11: The Watch
No. 12: The Lathe
No. 13: The Needle
No. 14: The Candle
No. 15: The Scale
No. 16: The Pot
No. 17: The Telescope
No. 18: The Level
No. 19: The Fish Hook
No. 20: The Chisel
