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This lesson document/lesson note is about Computer Viruses. You can use it as lesson material in all grades. By the end of the lesson, students should be able to: 1. explain what is meant by computer virus, 2. state the types of computer viruses, 3. give examples of computer viruses, 4. identify sources through which a computer become infected by a virus, 5. identify warning signs of the virus, 6. identify anti-virus software available for use against a virus. Sub-topics are; 1.

Types and components of computer systems1.1 Hardware and software 1.2 The main components of computer systems LEARNING OBJECTIVESBy the end of the lesson, students should be able to: •Define hardware as consisting of physical components of a computer system •Identify internal, external hardware devices and peripherals•Define software as programs for controlling the operation of a computer or processing of electronic data •Identify the two types of software – applications software and syst

TYPES AND COMPONENTS OF COMPUTER SYSTEMS1.3 Operating systems 1.4 Types of computer LEARNING OBJECTIVESBy the end of the lesson, students should be able to: •Define and describe operating systems which contain a Command Line Interface ( CLI) •Define and describe operating systems which contain a Graphical User Interface ( GUI) •Describe the differences, including the benefits and drawbacks, between operating systems which contain a CLI and those which contain a GUI•Describe the characte

ICT APPLICATIONS PART56.9 Banking applications6.11 Computers in medicine6.12 Computers in librariesLEARNING OBJECTIVES* Describe the computer processing involved in Electronic Funds Transfer (EFT)* Describe the computer processing involved in using Automatic Teller Machines (ATM)* Describe the use of processing credit/debit card transactions* Describe the clearing of cheques* Describe phone banking* Describe internet banking, and discuss the advantages and disadvantages of it * Describe

NETWORKS AND THE EFFECTS OF USING THEM4.1. Networks LEARNING OBJECTIVES•Understand how a router works and its purpose •Understand the use of other common network devices, including network interface cards, hubs, bridges, switches, modems•Understand the use of WiFi and Bluetooth in networks •Understand how to set up and configure a small network•Understand the characteristics and purpose of common network environments, such as intranets and the internets. INTRODUCTIONA Network i

SAFETY AND SECURITY8.1. Physical safety8.2. e-Safety8.3. Security of dataLEARNING OBJECTIVES•Describe common physical safety issues and what causes them •Describe some simple strategies for preventing these issues •Evaluate own use of IT equipment and develop strategies to minimise the potential safety risks•Explain what is meant by personal data•Explain why personal data should be confidential and protected•Explain how to avoid inappropriate disclosure of personal data •Discuss why e-

THE SYSTEM LIFE CYCLE 7.3 development and testing7.4 implementation7.5 documentation7.6 evaluationLEARNING OBJECTIVESq Testing designs q Testing strategies q Improvements needed as a result of testing q Different methods of system implementation q Methods of implementation q Technical documentation for an information system q User documentation for an information system q Describe the need to evaluate a solution in terms of the efficiency of the solution, the ease of use of the solution, and the

THE SYSTEM LIFE CYCLE 7.1 analysis7.2 designLEARNING OBJECTIVESØ Methods of researching an existing system Ø Recording and analysing information about the current system Ø System specificationØ Describe how it is necessary to design documents, files, forms/inputs, reports/outputs and validationØ Produce designs to solve a given problem Ø Design data capture forms and screen layouts Ø Design report layouts and screen displaysØ Design validation routines (including length check, t

ICT APPLICATIONS PART66.10 expert systems6.13 computers in the retail industry6.14 recognition systems6.15 Monitoring and tracking systems6.16 Satellite systemsLEARNING OBJECTIVESØ Identify a range of applications which use expert systems Ø Identify the components of an expert system Ø Describe how an expert system is used to suggest diagnosesØ Describe the use of point of sale ( POS) terminals, how the stock file is updated automatically, and how new stock can be ordered automatically

ICT APPLICATIONS PART46.5 Modelling applications6.6 Applications in manufacturing industries6.7 School management systems6.8 Booking systemsLEARNING OBJECTIVES= Describe the use of computer modeling in spreadsheets (e.g. for personal finance) = Describe a range of computer-controlled applications (e.g. robotics in manufacture and production line control) = Discuss the advantages and disadvantages of using computer-controlled systems rather than humans = Describe how systems are used to m

ICT APPLICATIONS PART16.1. Communication applicationsLEARNING OBJECTIVES* Describe a range of communication applications* Describe the use of mobile phones for communication * Describe the use of internet telephony, including Voice Over Internet Protocol (VOIP) * Describe applications for publicity and corporate image publications

NETWORKS AND THE EFFECTS OF USING THEM4.2. Network Issues and Communication LEARNING OBJECTIVES• Security issues regarding data transfer,• Network communication.4.2.1. Network securityThere are some security aspects such as hacking, phishing, pharming, and viruses in the digital world. Internet security is also a very important aspect needed to be careful.

Storage Devices and Media3.3 Secondary Storage Media LEARNING OBJECTIVES* Identify storage devices and their uses, e.g. * Describe the advantages and disadvantages of the above devices. All systems have storage media devices and are simply categorized as Primary storage media and Secondary storage media. Primary storage mediaPrimary storage is commonly referred to as “ primary memory” which is volatile (temporary) such as the RAM which tends to lose data as soon as the computer reboots or loses

Storage Devices and Media3.1 Backing up of Data 3.2 Types of Access LEARNING OBJECTIVES* Identify storage devices and their uses, e.g. * Describe the advantages and disadvantages of the above devices. 3.1. Backing up of data3.1.1. What is backing up of data? Backing up refers to the copying of files/data to a different medium (disk, tape, flash drive, etc.) in case of a problem with the main secondary storage device.

INPUT AND OUTPUT DEVICES2.2. Direct data entry and associated devices LEARNING OBJECTIVES• Describe direct data entry and associated devices, e.g. magnetic and optical readers.• Identify the advantages and disadvantages in comparison with others. 2.2 Direct data entry (DOE) devices•Direct data entry devices are devices that read data from a source that’s provided and transferred it directly to the computer system. •Unlike, input devices which rely on physical interaction which means yo

INPUT AND OUTPUT DEVICES2.1 input devices and their uses 2.3 output devices and their uses LEARNING OBJECTIVES•Identify input devices and their uses, e.g. keyboard, numeric keypad. •Identify output devices and their uses, e.g. CRT monitor, speakers. •Describe the advantages and disadvantages of any of the above devices. 2.1 Input devices and their uses•These are hardware devices that allow data to be input into a computer. 2.1.1 KEYBOARDS, •Keyboards are used to input text, numbers and

ICT APPLICATIONS6.2. Data handling applications6.3. Measurement applicationsLEARNING OBJECTIVES»Describe the use of a range of data handling applications»Describe a range of measurement applications (e.g. scientific experiments, weather stations) »Explain the difference between analogue data and digital data»Explain the need for conversion between analogue and digital data»Describe the use of microprocessors and computers in a number of applications (e.g. pollution monitoring, i

THE COMPUTER HARDWAREHardware is a physical part of the computer that can be seen and touched. HARDWARE COMPONENTSThese are the physical parts of the computer system such as the monitor, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory (RAM), motherboard. It can be classified; System Unit and PeripheralsSYSTEM UNITPERIPHERALSInput DevicesStorage DevicesOutput DevicesProcessThe Input Unit (Device)Input devices are peripheral devices that enter data an

TYPES AND COMPONENTS OF COMPUTER SYSTEMS1.5 impact of emerging technologies LEARNING OBJECTIVESBy the end of the lesson, students should be able to: •Describe how emerging technologies are having an impact on everyday life (e.g. Artificial intelligence biometrics, vision enhancement, robotics, quantum cryptography, computer-assisted translation, 3D and holographic imaging, virtual reality).

ICT APPLICATIONS PART36.4. Microprocessors in control applicationsLEARNING OBJECTIVES∞ Describe the role of a microprocessor or computer in control applications, including the role of the pre-set value, ∞ Describe the use of computer control in applications (e.g. turtle graphics, automatic washing machines, automatic cookers, computer-controlled central heating systems, burglar alarms, computer-controlled glasshouse) INTRODUCTIONSIn control applications, sensors send data to the microp