1. Evolution of computing devices

2. EARLIEST COMPUTING DEVICES

3. ABACUS Developed by Chinese About 3000 BC
Beads that slides through rods

4. PASCALINE
Blaise Pascal, French Mathematician, invented the Pascaline between 1642 and 1644
The Pascaline could only add and subtract numbers

5. STEPPED RECONER
Invented by Gottfried Wilhelm Liebnitz, a German mathematician in 1671
The first Mechanical Machine invented
This machine can add, subtract, divide, multiply and even get the square root of a number

6. JACQUARDS LOOM Invented by Joseph Jacquard a silk weaver in 1801
The first machine to use punch card
His punched card system was adopted in the 20th-century as a control and data input system for many office machines and early digital computers.

7. TABULATING MACHINE Invented by Herman Hollerith sometime in 1890
The machine treats information in the form of holes punched through a strip of paper.
His tabulating machine pave way for the International Business Machine of today.