1. Acomputer, what you see nowadays around you, were not like this in the earliest days. when people learned to con't and do calculationa, they started to search fast counting devices in the earliest time. the need of fast counting and calculation device in the earliest time led to the development of computers started just from the abecas.
2. abacus
the abacus is the firsttruecom puting device ddeveloped in china about 3000 years ago. it was made up a wooden frame is divided in to two parts heaven and in earth has five beads. it is based on the decimal number systems the first vertical ber is for ones, the second for tens. and so on
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