A computer is a device that accepts information and manipulates it for some result based on a program or sequence of instructions on how the data is to be processed. It has also the ability to retrieve and store data.
A computer is a machine, It is also called a PC. it looks like a television. It can show pictures like a TV. Can your TV do any homework for you? NO! but a computer can.
You want to do sums on this machine, you can do so, if your mummy wants to keep information about her monthly expenses, she can also do it, using this machine, IF your Daddy wants to do some office work , he can do it sitting at home just by connecting his PC at home to the PC in his office so does it mean that there is some kind of magic involved in machine for doing such job ? no, not at all, ALL these are the abilities that are built into the computer at the time of its manufacturing.
Types of Computer
Most of the people understand that computer is only in the shape of a personal computer such as a desktop or laptop. but, computers come in many shapes and sizes, and they also perform different functions. When you withdraw cash from an ATM, scan groceries at the store, or use a calculator, all are types of computers. Smart Phone, Smart TV, Game Console and many others are the types of computers. Personal computers come in two different styles, PCs and Mac. Both are fully functional, but they have a different look and feel.
The PCs begin with the original IBM PC that was introduced in 1981. Other companies began creating similar computers, which were called IBM PC Compatible Today, this is the most common type of personal computer, and it typically includes the Microsoft Windows operating system.
The Macintosh was introduced in 1984, and it was the first widely-sold personal computer with a graphical user interface. All Macs are made by one company (Apple), and they almost always use the Mac OS X operating system.
Most of the people used desktop computers at the workplace, home, and school. Desktop computers are designed to be placed on a desk. The desktop computer is made up of different parts, that including the casing, monitor, keyboard, and mouse. The desktop computer is available, one is called desktop and the other is called the tower.
The second type of computer, most of the people are familiar with the laptop. The Laptops are battery-powered computers that are more portable than desktops, allowing you to use them almost anywhere.
The handheld computers that are even more portable than laptops. Instead of a keyboard and mouse, tablets use a touch-sensitive screen for typing and navigation.
A server is a computer that provides services to another computer on the same network or remote networks. The computer that a server program runs in is also frequently referred to as a server. That machine may be a dedicated server or used for other purposes as well.