Computer Software and Types of Software

INTRODUCTION

Program or a set of programs is known as Software. Now, What is program? Program is a instruction or set of instructions. So, we can say Computer Programs, namely, the list of  instructions to be executed by a computer are known as the software of a computer. The electronic circuits used in building the computer that executes the software is known as hardware of a computer.   It refers to the physical devices of a computer system, such as Input devices, storage devices, processing unit, control unit , and output devices. A hardware is linked together with software to form a effective working unit that is a computer system.  To take analogy, a home television set bought from a shop is hardware; the various entertainment programs transmitted from the television station are its software. It is immediately evident that hardware is necessary but software is vital. What is the use of a home television set if the programs not transmitted by television station. Another important point brought out by this analogy is that software production is difficult and expensive. Hardware is one-time expense whereas software is a recurring expense.

Thus, there is a special relationship between hardware and software. Both are complementary to each other. Hardware is nothing without software and vice-versa.  By very simple example, these two can be described as both a notebook and a pen are hardware and the written material on notebook is software.

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What is Computer?

The word computer means to compute or to calculate. So a computer is normally considered to be a calculating device.

But, more than 85% of the work done by computer today is of non-mathematical. Hence, a computer may be defined as a device that operates upon data or information. So computer can be defined as a machine in which we can

  • Store data or information,
  • Process data or information,
  • Retrieve data or information

With our requirements

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