The world’s first electronic computer (1. build) by the University of Pennsylvania in 1946. However, computers ( 2. sell) commercially for the first time in the 1950s. Much progress on computers (3. make) since 1950. Computers are now much smaller and more powerful and they (4. can buy) much more cheaply.
Computers (5. use) in many fields − in business, science, medicine, and education, for example. They (6. can use) to forecast the weather or to control robots which make cars. The computer’s memory is the place where information (7. store) and calculations (8. do). A computer cannot think for itself − it (9. must tell) exactly what to do. A lot of difficult calculations (10. can do) very quickly on computers.