Forbes: The 20 Most Important Tools Ever :
No. 1 The Knife 刀
No. 2 The Abacus 算盘
No. 3 The Compass 罗盘
No. 4: The Pencil 铅笔
No. 5: The Harness 马具
No. 6: The Scythe 镰刀
No. 7: The Rifle 来福枪
No. 8: The Sword 剑
No. 9: Eyeglasses 眼镜
No. 10: The Saw 锯
No. 11: The Watch 腕表
No. 12: The Lathe 车床
No. 13: The Needle 针
No. 14: The Candle 蜡烛
No. 15: The Scale 秤
No. 16: The Pot 瓢
No. 17: The Telescope 望远镜
No. 18: The Level 水平仪
No. 19: The Fish Hook 钓鱼勾
No. 20: The Chisel 凿子
