用英语写2篇发明的介绍

Computer enjoys a long history and it is one of the most inventions.

Today, it is widely used in many fields.

The oldest computers is the abacus used in China several centries ago, but the computer is becoming smaller and smaller now, and it can be used in shops, factories and hospitals.
The abacus was invented in the sixth century by Chinese people.The umbrella was invented about 4000 years ago in Assyria,China and Egypt.The binoculars was invented in 1854 by Ignatio Porro in Italy.The camera was invented in 1827 by Joseph Nicephore Niepce who took the first picture.The bicycle was invented in 1880s in England.

The computers are developing with an astonishing speed, and no one could expect what it will be like in the future.