Overview of Computer

A computer is a electronic programmable machine which can perform a specific set of instructions in a well-defined manner & also executes a prerecorded list of instructions which we know as program. It can be programmed to carry out numerous logical & arithmetic operations. Computer takes the data from input devices, then it stores, process & outputs the resulted data through the output devices. The first electronic digital computers were developed between 1940 and 1945. Originally they were the huge machines, consuming as much power as several hundred modern personal computers & required teams of people to operate. Compared to those early machines, today's computers are amazing. Not only are they thousands of times faster, they can fit on your desk, in your lap, or even in your pocket.

A computer system has three main components: hardware, software, and people. Hardware refers to the parts of a computer that you can see and touch, including the case and everything inside it. Computers work through an interaction of hardware and software. The most important piece of hardware is a tiny rectangular chip inside your computer called the central processing unit (CPU), which we also generally know as the microprocessor. It is the "brain" of your computer. This part of computer translates instructions and performs calculations. Hardware items are such as your monitor, keyboard, mouse, printer, and other items are often called hardware devices.

 Software refers to the instructions, or programs, that tell the hardware what to do. A word processing program that you can use to write letters on your computer is a type of software. The operating system (OS) is software that manages your computer and the devices connected to it. Two well-known operating systems are Windows and Macintosh operating system. Some other examples of OS are Ubantu, Linux, etc. Most of the people use the Windows operating system.

People, however, are the most important component of a computer system that uses the power of computer for different purposes. In today’s world, we can see computer in every field like in restaurant, colleges, schools, government offices, business organization, & so on.