Basics of Computers – Introduction

As a modern kid, you’ve probably used, seen, or read about computers. Because it is an integral part of our daily life. In schools, banks, shops, train stations, hospitals, and at home, computers are everywhere to make work easier and faster. Since they are an integral part of our lives, we need to know what they are and how they function. Let’s start with the formal definition of the term “computer.

The literal meaning of the word “computer” is a device capable of calculation. But modern computers can do much more than just compute. A computer is an electronic device that accepts input, stores or processes it according to user instructions, and provides output in a desired format.

Input-Process-Output Model

Computer input is called data, and the output obtained after processing according to user instructions is called information. Raw facts and figures that can be processed using arithmetic and logical operations to obtain information are called data.

There are two types of processes that can be applied to data.

Arithmetic Operations – Examples include calculations such as addition, subtraction, differentiation, and square roots., equal to, opposite, etc.

logical operation – Examples include comparison operations such as greater than, less than, equal to, and opposite.

Here is a picture that corresponds to a real computer.

• Input Blocks – Devices such as keyboards and mice that are used to enter data and commands into a computer are called input blocks.

• Output Devices – Devices such as printers and visual displays that are used to present information to the user in a desired format are referred to as output devices.

• Control Box – As the name suggests, this box controls all functions of the computer. Every device or part of a computer interacts through a control unit.

• The arithmetic logic unit – is the brain of the computer where all arithmetic and logical operations are performed.

• Memory – All inputs, commands and intermediate data for a process are stored in memory.
• There are two types of
• memory: primary memory and secondary memory. Primary memory is internal to the CPU and secondary memory is external to the CPU.

The control unit, arithmetic logic unit and memory are collectively referred to as the central processing unit or CPU. Computer devices such as keyboard, mouse, printer, etc. What we can see and touch are the computer’s hardware components. A set of instructions or programs that use these hardware parts to perform computer functions is called software. You cannot see or touch the software. A computer needs both hardware and software to function.

Characteristics of Computers

To understand why computers are such an important part of our lives, let’s take a look at some of their characteristics. Errors that may occur are usually due to incorrect data, incorrect instructions, or chip bugs, all human error.

Reliability – Computers can perform the same type of work repeatedly without failing due to fatigue or boredom common to humans.

Versatility – Computers can perform a variety of tasks, from data entry and ticket booking to complex mathematical calculations and continuous astronomical observations. If you can enter the required data with the correct instructions, the computer will take over.

Storage Capacity – Computers can store very large amounts of data at a fraction of the cost of traditional file storage. Additionally, your data is protected from the normal wear and tear of paper.

Advantages of Using Computers

Now that you know the characteristics of computers, you can understand the advantages they provide −

• Computers can perform the same tasks repeatedly with the same precision.
• Computers don’t make you tired or bored.
• Computers can take over routine tasks while freeing human resources for more intelligent functions.
• Despite its many advantages, computers have their own drawbacks

• Computers have no intelligence. They blindly follow instructions without considering the consequences.
• Computers require a steady power supply to operate, and this is proving to be difficult everywhere. This is especially true in developing countries.

Booting

Starting a computer or a device built into a computer is called booting. Booting is a two-step process −

• Turning on the power
• Loading the operating system into the computer’s main memory
• Keeping all applications available in case the user needs it

computer A system with is on is called BIOS or Basic Input Output System. BIOS is firmware, that is, software that is permanently programmed into your hardware.

When the system is already running but needs to be rebooted, it is called rebooting. A reboot may be required if software or hardware is installed, or if the system is unusually slow. There are two types of

Types of boot −

• Cold Boot − Powering up the system is called cold boot. The next step after a cold boot is loading the BIOS.
• Warm Boot – When the system is already running and requires a reboot or reboot, it is called a warm boot. A warm boot is faster than a cold boot because the BIOS is not reloaded.