Read the passage and use the words in the box to fill in the space.

The first worlds computer was built at University of Pennsylvania in 1946, although computer-like machines were built in the 19^th century. Computers were ........................... (1) commercially for the first time in the 1950s, and a lot of progresshas been made then. Computers are now much ........................... (2) and more powerful.

Computers are used in ........................... (3) fields – in business, science, medicine, andeducation. They can be used to forecast the weather or to control robots........................... (4) make cars. The computer’s memory is the place .......................... (5) informationis kept and calculations are done. A computer cannot think for itself. It must betold exactly....................... (6) to do. A lot of difficult calculations can be done veryquickly on a computer. Computers don’t ........................... (7) mistakes. Stories are heardsometimes about computers paying people too........................... (8) money or sendingthem bills for things they didn’t buy. These mistakes are made by programmers.Some years ........................... (9), an American computer-controlled rocket went out ofcontrol and had to be destroyed. The accident was caused by a small mistake in one line of the program, ........................... (10) cost the USA 18 million dollars. Criminalshave found that computer crimes are a lot easier than robbing banks. Hundreds of millions of dollars are stolen from business every year by people changing the information in computers.