ICT Reviewer

a calculating device made by Chinese people about 3000 B.C.

• Napier's Bone

• Abacus

• Slide Rule

• Calculator

Part of Abacus: the place value

• ruds

• rods

• beads

• bids

part of abacus: represent the value of a number

• ruds

• rods

• beads

• bids

built from mechanical components such as levers and gears.

• calculator

• mechanical computers

• slide rule

• pascaline

The inventor of Napier's Bone.

• John Napier

• Blaise Pascal

• William Ouhtred

• Ashton Matteo

made up of rods with numbers that can add, subtract, and multiply large numbers

• Pascaline

• Slide Rule

• Napier's Bone

• Leibnitz Calculator

known as the calculator of engineers

• Mechanical Computer

• Slide Rule

• Pascaline

• Mark 1

The inventor of Slide Rule

• John Napier

• William Oughtred

• Blaise Pascal

• Kennedy Lepardo

The Inventor of Pascaline on 1642

• Blaise Pascal

• John Napier

• Mechanical Computer

• William Ougthred

The Inventor of LEIBNITZ CALCULATOR (1773)

• Gottfried Leibnitz

• Blaise Pascal

• Charles Babbage

• John Napier