2. USE of pebble and stone
Since the earliest times people used their fingers to show
how many. Thus they could show the number of animals
killed on a hunt.
3. THE ABACUS
The abacus was the first calculating machine. It was developed by the
Chinese about 5000 years ago.
4. Napier’s bones
In 1617, John Napier, a mathematician from scot land ,
invented calculating rods called Napier’s bones
5. Babbage Engine
The first calculating machine that can be truly
called a computer was invented in England by
Charles Babbage in 1835.