Chapter 1_ How computer began

The first computer were too big, heavy and cheap to have in your home.

The computers were first built in the 1940s and ______.

As computer chips became smaller during the _______, companies began to make laptops.

Babbage then started work on another machine, called the Analytical Engine.

Today 's computer chips work so fast, they can even understand spoken language.

Apple is not the only famous computer company which still uses it own operating system.

In the 1820s a British mathematician called Charles Babbage invented a machine that did very difficult ________ automatically.

In 1977 the second computer, the Apple 2, appeared.

The computers were __________.

The word "computer" used to mean a _________.