Computer Studies Form 1

Indice

1. 1. Concept of Information

   1 test 16 domande

   Lezioni sugli argomenti

   • Data and information
   • Types of data and the information processing cycle
   • Qualities of good information
   • Sources and communication of information
   • Summary

   Data and information Data are raw facts and figures that have not yet been organised or given meaning. Examples are the numbers 64, 71 and 58, a list of names, or the readings of a rain gauge. On their own, data tell us very little. Information is data that has been processed (organised, calculated, sorted or…

2. 2. The Computer

   1 test 17 domande

   Lezioni sugli argomenti

   • What is a computer? Characteristics and limitations
   • Parts of a computer system: input and output devices
   • The Central Processing Unit and main memory
   • Secondary storage and measuring storage
   • Classification of computers
   • Summary

   What is a computer? A computer is an electronic device that accepts data (input), processes it according to a set of instructions called a program , produces results (output) and can store data and results for future use. The physical parts of a computer are called hardware ; the programs that tell it what to do are…

3. 3. Computer Evolution

   1 test 15 domande

   Lezioni sugli argomenti

   • Early counting aids and the abacus
   • Mechanical calculating machines
   • Babbage, Lovelace and Hollerith
   • Generations of electronic computers and trends
   • Summary

   Meaning of computer evolution Computer evolution is the gradual development of computing devices, from simple counting aids used thousands of years ago to the powerful, small computers we use today. Each new invention solved some problems of the earlier ones: it was faster, more reliable, smaller or cheaper. Early…

4. 4. Computer Software

   1 test 17 domande

   Lezioni sugli argomenti

   • What is software?
   • The operating system and user interfaces
   • Utility programs and device drivers
   • Programming languages and language translators
   • Application software and how software is obtained
   • Summary

   What is software? Software is the set of programs, together with their data and instructions, that make the computer hardware do useful work. Hardware without software cannot do anything; software without hardware has nothing to run on. Software is divided into two main groups: system software and application software…

5. 5. Computer Handling

   1 test 17 domande

   Lezioni sugli argomenti

   • The computer laboratory environment
   • Power protection and laboratory rules
   • Starting and shutting down a computer
   • Using the keyboard and the mouse
   • Health and safety when using computers
   • Summary

   Why careful handling matters Computers are expensive and contain delicate electronic parts. Computer handling means using, caring for and protecting computers and their users in a safe way. Good handling makes equipment last longer, keeps data safe and protects people from injury. The computer laboratory A good…