1. What is computer?
  2. Who invented it?
  3. What are are its main components?
  4. What are its main functions?
  5. What changes has it brought in our life?

Answer: computer is one the most wonderful inventions of modern science. It is fairly a recent invention. It has now become a part and parcel of day-to-day life. Computer was invented by an English mathematician called Charles Babbage. Computers are of two basic types: analog and digital. Analog: computers deal with physical qualities and digital computers deal with numbers. Computers have five major components; input, store, control, processing and output. They mainly perform the functions of addition, subtraction, multiplication, division and comparison. Every computer has a language of its own. It is called programming language. Computer has brought about a revolutionary change in our life. It can solve the complex mathematical problems quickly and accurately. This is why, many people call “the computer an electronic brain”.