Lesson 1:

💻1.2. What is a Computer?

Computers are general purpose, programmable devices that are capable of calculating and storing results. They can be used for typing, desktop publishing, sound editing, video editing, accounts, email, internet browsing and technical drawing – just to name a few. They are used in businesses, government, education, entertainment, health care, sport, art and design, homes, clubs, restaurants, libraries, car engines, bank automatic teller machines, supermarket checkouts, washing machines, telephone systems, video recorders and watches.

All computer information is stored in digital format. This format is binary code which consists only of 0s and 1s – on and off. Everything input into the computer is converted into binary code and likewise, in order to output the information into its original state, the binary code must converted back again.