Text Book ''IT''

a) Complete:
1. The industrial Age started In the nineteenth century.
2. Many people use computers every day.
3. The first computers were built in the 1940s and 1950s
4. The abacus was invented between 1900 and 1800 BC
5. A French matematician made an Arithmetic Machine

b) Make three questions yourself:
1.Now a computer can be as small as ....