We can’t dispense it, and maybe we can’t live without it. |The computer is one of the most important technologies ever invented. In this age, we use computers every day and in almost all our jobs. It makes our lives easier, for instance, it cuts short the time that we spend to execute our tasks. Also, it is more accurate to do calculations. The computer can be classified into many types depending on size, power, or purpose of use. There are three famous types that we might see every day: the laptop, desktop, and handheld.
First of all, the laptop is a type of personal computer which is a portable device. The size of it varies including small, medium, heavy, and light. Its components like a keyboard, mouse, and CPU (Central Processing Unit) are integrated with the main system itself. Also, the optical device like the CD-drive is internal. Besides, a laptop is not powered by electricity but by a battery most of the time. Therefore, we can use it even when the power is cut or when we are away from home where there is not electricity.
The desktop is another type of computer. It is designed to fit on the top of the desk. Its size is big and heavy, so it has to be stationary. Desktop model computers are broad and comfortable to use. We can find this type in internet cafés, computer labs in school, and offices. Their components are opposite laptop’s components. They are separated from the main system. The optical device is internal, and you can connect with any external optical device that you need. Furthermore, the desktop feeds on electricity. It doesn’t work without it. For that reason we need to use desktops where the electricity is. Also, it is not convenient to move the desktop from place to place.
The last type of computer is the handheld, or sometimes it is called the pocket PC. It is a portable device that is small enough to be held in one hand. Also, it is used as a phone, so it is light. The most popular handheld computers are designed to provide personal information manager functions, such as a calendar and an address book. The hardware component like keyboard is replaced with an electronic pen, and it doesn’t have any optical device, so it is incapable of running CDs. However, these pen-based devices rely on handwriting recognition technologies. Moreover, the handheld computer works by battery, and we can use it without relying on electricity.
Computers are very popular technology now. Most people use them every day in schools, houses, work, and hospitals. Laptops, desktops, and handheld computers are the most common, especially the laptop that is the most popular type of computer use. Maybe we find everyone in the family owns private one. In my opinion, our purchase of the appropriate computer depends on what we need and what we want depending on its size, its components, and its power source.
