A computer is an electronic device that processes data according to instructions stored in its memory. It accepts data as input, processes the data, stores and outputs the results. The main components of a computer are the input devices, output devices, system unit, CPU, memory, storage devices and communications devices. Computers provide advantages like speed, reliability, storage and communication but also have disadvantages like privacy violations, health risks and environmental impacts. Networks connect computers together via transmission media like cables, satellites and phone lines to share resources and information. Software programs tell the computer what to do and are divided into system software and application software. Computers are used in many fields like education, finance, government, healthcare, publishing and more.

1. CHAPTER 1INTRODUCTION TO COMPUTERS By : Jasmeet Khosa

2. What is a computer ?How is computer defined ?Electronic device operating under the control of instructions stored in its own memoryAccepts Data Processes Data into InformationProduces and stores results

3. What is a computer ?What is the information processing cycle ? Input

4. Process

5. Output

6. Storage

7. CommunicationThe components of a computer ?What is an input device ?Hardware used to enter data and instructions.What is and output device ? Hardware that conveys information to one or more people.What is a system Unit ?Case containing electronic components used to process data.The components of a computer ?What are the two main components on the motherboard ?Central Processing Unit (CPU)* Also called as processor.Memory

8. The components of a computer ?What is storage?Holds Data, instructions and information for future use.

9. The two components of storage are:Storage MediaStorage Device

10. The components of a computer ?Examples of storage media are:Portable, thin memory cardsUSB flash driveFloppy DiskCompact Disk (CD)Hard Disk

11. The components of a computer ?What is a communications device ?Hardware components that enables a computer to send and receive Data, instructions, and information.Occurs over cables, telephone lines, cellular radio network, Satellites, and others transmission media.

12. ADVANTAGES AND DISADVANTAGES OF USING COMPUTERS ?What is the advantages of using computers ?ReliabilitySpeedCommunicationsConsistencyStorage

13. ADVANTAGES AND DISADVANTAGES OF USING COMPUTERS ?What is the disadvantages of using computers ?Violation of privacyImpact on Labor ForceHealth RisksImpact on Environment

14. Network and the internet ?What is a network ?Collection of computers and devices connected together.Communications DeviceTransmission MediaEnable a connection between computersCablesSatellitesTelephone linesCellular radioOne type is a modem

15. Network and the internet ?To save time and moneyWhat are the reasons to internet ?To shareResourcesInformationHardware devicesDataSoftware programs

16. Network and the internet ?Why do users access the internet ?CommunicationInformationShoppingBanking and investingClassesEntertainment

17. COMPUTER SOFTWARE?What is a software ?Consists of a series of instructions that tells the computer what to doAlso called a program

18. COMPUTER SOFTWARE?What is system software ? Programs that control or maintain the operations of the computer and its devices.What is application software ? Programs that performs that perform specific tasks for users.What is a programmers ? Someone who develops applications or system software.Categories of computers ?What are the categories of computers ?Microcomputers

19. Mobile computers and mobile devices

20. Midrange Servers

21. Mainframes

22. Supercomputers

23. Embedded ComputersCategories of computers ?What are the categories of computers ?Under microcomputers there are :DesktopLaptopTablet PcPalm PCPDANet book

24. SERVERS?What types of servers are there ?Midrange server