When personal computers first came out in the 1980s, there was really only one way to get information into them - with a 1. .........................

Then graphical interfaces came along, and it became important to be able to interact with objects on the screen. The commonest way of doing this is with a 2. ..........................

But some computers - for example tablet-style computers - have screens you can write on directly, using a touchscreen or a 3. ..........................

People who use their computers mainly for games will tell you that the most important way of communicating with their computers is with a 4. ..........................

It took almost a decade before computers became powerful enough to accept voice commands, but today we can communicate with our computer with a 5. ..........................

We can also talk to other computer users, and even see them through a 6. ..........................

The computer has mostly replaced the 7. ......................... machine.

However, if you do receive a printed page, you can still put a copy into your computer with a 8. .........................

Today, a 9. ......................... network or bluetooth will let you connect to your computer with almost any electronic device.

One such device is a 10. ......................... phone.