ZIMSEC O Level Computer Science Notes: Hardware and Software: Introduction 

  • A computer system is made up of two important elements which are hardware and software.
  • A computer is defined as an electronic device capable of accepting data (raw facts and figures)as input, processes (works on it) produces information (data converted into a meaningful form) as output, the information is stored in the computer system for later use.
  • A computer system works under the control of stored programs.
  • A stored program is also known as software.
  • Hardware– refers to the tangible, physical and mechanical components of a computer system, Hardware device can be internal or peripheral.
  • Internal hardware devices include hard drive disc, Random access memory (also known as RAM) and a processor.
  • Peripherals are devices that are external but can be connected to a computer. They are not essential for the functioning of the computer but can be connected to the computer for specific reasons. Examples are scanners, modems, printers, speakers, digital cameras, etc.
  • Software– refers to the intangible computer components, which are the programs or instructions of the computer. The hardware needs these instructions to function.
  • Data-refers to raw facts and figures of an activity. It can just be a list of numbers, names or a combination of these. Data is meaningless and needs to be processed.
  • Data cannot be used for decision-making purposes as it is meaningless.
  • Information– It is data that has been converted into a meaningful form.
  • In general, it is processed data.
  • Information can be understood and therefore can be used for decision-making purposes. Information is meaningful.
  • To get relevant information data entered into the computer must be accurate, relevant and up to date

To access more topics go to the O Level Computer Science Notes page

Quick NetOne, Telecel, Africom, And Econet Airtime Recharge

If anything goes wrong, chat with us using the chat feature at the bottom right of this screen