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• • A computer system comprises two major components: hardware and software.
• • Hardware refers to all physical items associated with a computer system.
• • Software is a set of instructions enabling hardware to perform specific tasks.
• • Integration of physical hardware and non-physical software forms a computer system.
• • Input Devices: Allow users to input programs and data, common examples include keyboard, mouse, and scanners.
• • Processor: Manipulates input data into required information, executes computer instructions.
• • Memory: Main memory from which CPU fetches instructions and data, also known as primary memory, volatile in nature.
• • Output Devices: Display processed data (information), common examples are monitors and printers.
• • Storage: Usually refers to secondary storage, stores data and programs permanently for future use.
• • Peripheral equipment are the hardware devices attached to the computer. It includes all input, output, and secondary storage devices attached to the computer.
• Computer software is composed of system software and application software
• • Software makes the computer perform meaningful tasks, comprises planned, step-by-step instructions to turn data into information.
• • System Software

  -           consists of general program ( programs that provide the environment to run the application programs) written for a computer.
• System software

  • it comprises programs, which interact with the hardware at a very basic level.
• System software

  • It is the basic necessity of a computer system or its proper functioning.
• System software

  • It serves as the interface between hardware and the user. The operating system, compilers and utility programs are examples of system software.