Entry 2. Touch screen and mouse.

An equipment of computer mouse was invented more than 40 years ago. Besides, it is used widely nowadays. Its appearance and function have been improved. Touch screen appeared after the ninetieth years. It can substitute for mouse. Besides, they both have advantages and disadvantages. In offices, schools, universities mouse is more comfortable. In workplaces, workshops, service centers, factors touch screen can be more convenient. Yet, the advantages of mouse are more than touch screen. For example, the we press button or monitor the more they are done harm. If mouse broken we can exchange it for little money. If touch screen broken it will cost us much money. Also the more we touch the monitor, the more it will be dirty. Now new generations of computers IPads are being popular day by day. They are very comfortable to carry with you. It doesn't have a special separate keyboard and mouse. It can be controlled with the aid of touch screen. It is one advantage of touch screen.