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GCSE Information and Communication Technology
5.1   Paper 1      
  5.1.1 INFORMATION PROCESSING
(a) Data, Information and Knowledge Candidates should understand
  • data consists of raw facts and figures eg readings from sensors, survey facts;
  • information is data which has been processed by the computer;
  • knowledge is derived from information by allying rules to it;
  • the need for good quality data; G.I.G.O. (Garbage In, garbage Out)
(b) The advantages and disadvantages of using ICT for storing, processing and transmission of data.
  • The potential benefits of encoding data;
  • the improved speed of access to data;
  • the variety of output formats available;
  • the potential and availability of improved services when using ICT.
(c) Methods of securing data. Candidates should be able to identify:
  • potential types of errors and understand methods for minimising the risk of errors;
  • data validation techniques for single user and online systems such as range checks, format checks, presence checks and check digits;
  • how to protect data from accidental destruction;
  • how to protect data from deliberate damage caused by viruses and other types of malicious damage;
  • how to protect stored or transmitted data from unauthorised access.
  5.1.2 THE IMPLICATIONS OF THE USE OF ICT
(a) ICT used by retail services
  • Point of sales
  • stock control
  • online booking
  • banking systems
(i) Identify the data required and methods of capturing data and the advantages and disadvantages of using these methods.
  • Barcodes
  • POS terminals
  • OMR
  • MICR
  • OCR
  • machine-readable tags
  • portable data entry (PDET)
  • touch sensitive data entry devices.
(ii) Describe the function of an automatic shopping system. Systems which control the selling, ordering, supply and delivery of goods.
(b) Identify the technology responsible for the replacement of cash. Electronic funds transfer at the point of sale (EFTPOS), automatic teller machines (ATMs), cheque processing, home banking, smart cards and loyalty cards.
(c) Communications Services Candidates should be able to:
  • describe the services available on the Internet, such as email, online databases teleconferencing, e-commerce, telebanking, web publishing, chat lines, fax, radio, music and video broadcasting;
  • describe the hardware and software needed to access the Internet;
  • understand the differences between teletext and interactive services;

  • describe the services obtainable through interactive digital television;
  • describe the services obtainable through cellular mobile phones.
  • describe the advantages and disadvantages of using newer technological forms of communication over traditional forms of communication such as the postal service and landline telephones.
(d) The Electronic Office: Candidates should be able to:
(i) identify and describe the hardware and software required to change, process and transmit information in the automated office.
  • describe the hardware used in networks and the advantages and disadvantages of using networks;
  • identify developments in the automated office such as the Internet and Intranets and be able to state potential uses of such developments;
  • describe the facilities offered and the benefits of using software packages such as word-processing and desktop publishing software, spreadsheets, information handling software, communications software and graphic design software;
  • describe new developments in interfaces such as GUIs WIMPs, Voice, Special devices such as Braille keyboards, concept keyboards and touch sensitive devices.
(ii) health and safety
  • State potential health hazards when using computers;
  • suggest methods for prevention or reducing the risk of potential health hazards.
(e) ICT in the home and leisure activities Candidates should be able to describe:
  • the use of ICT in the home to support home learning and improve lifestyles;
  • ICT based leisure activities such as home publishing, games, DVD films, computer art, interactive television services, music and sound technology;
  • computer control in the home, such as alarm systems, environmental control in homes and gardens, microprocessor control in electrical appliances such as refrigerators, VCRs.
(f) Education
  • Effects upon patterns of learning (eg attention span);
  • the benefits of using ICT in aiding learning (eg for coursework, special needs, distance learning) and organising events in school.
  • the use of datalogging and control in the school environment and understand the advantages and disadvantages of using this technology.
  5.1.3 THE IMPACT OF IT
Candidates should be able to reflect critically on the impact of ICT on their own and others' lives considering the social, economic, political, legal, ethical and moral issues. Candidates should understand issues relating to:
  • employment
  • retraining
  • changes in working practices;
  • teleworking;
  • the economic impact of e-commerce;
  • codes of practice;
  • legal issues relating to hacking, spreading of viruses, computer fraud and copyright.
  5.1.4 PROBLEM SOLVING
Problem solving using ICT Candidates should be able to:
  • use information sources and know when it is appropriate to use ICT tools to share, exchange and present information in a variety of contexts;
  • apply as appropriate the concepts and techniques of using ICT to measure, record, respond to control and automate events;
  • use and apply as appropriate ICT to explore develop and interpret information and solve problems in a variety of contexts and suggest hardware software and processing activities suitable for solving data handling problems;
  • apply as appropriate the concepts and techniques of ICT based modelling, considering their advantages and limitations against other methods;
  • Consider how the information found and developed using ICT should be interpreted and presented in forms that are sensitive to the needs of particular audiences, fit for purposes and suit the information content.
5.2   Paper 2.
  5.2.1 APPLICATIONS
Applications of ICT Candidates should study the following applications to enhance their understanding of the specification:
  • CAD/CAM
  • simulations;
  • weather forecasting;
  • process control;
  • robotics and embedded systems;
  • payroll;
  • theatre and airline booking systems;
  • expert systems;
  • artificial intelligence;
  • medicine;
  • Geographical Information Systems;
  • libraries;
  • stock control;
  • order processing.
  5.2.2 INFORMATION PROCESSING
Input, process, output. Candidates should be aware of the three stages of the information processing cycle.
  5.2.3 CONTROLS ON DATA
Candidates should:
(a) The methods used to gather, store, process and present information in a number of applications. know when, where and why the following methods of data collection are used: questionnaires, data capture forms, data logging and automated data capture (to include OMR, OCR, MICR, bar codes, magnetic strip);
appreciate their suitability within the application being studied;
(b) The advantages and disadvantages of using computers in the given application.
(c) Validation and verification. be able to define validation as checking that the data is sensible, fair and reasonable or is within stated ranges;
and verification as checking that data has been copied from one medium to another correctly;
(d) The need for verification and validation understand the need for verification and validation;
be aware of the possible sources of error which could exist and they should have a knowledge of techniques used to overcome these (eliminate errors);
(e) Know the methods used for validation and verification and where they are appropriate. describe the folllowing:
Verification
  • parity check
  • double keying
  • visual check
Validation
  • range check
  • check digits
  • presence checks
  • batch totals
  • hash totals
  5.2.4 STORING INFORMATION
Candidates should:
(a) Data types be aware of a variety of data types to include strings (alphanumeric), integer, decimal, currency, dates, calculated fields, picture, sound and video;
(b) Define a field understand that a field is a group of related characters;
(c) Define fixed and variable length fields understand that a fixed length field has a pre-defined number of characters;
and that a variable length field uses only the amount of memory necessary;
appreciate the benefits and drawbacks of each type;
(d) Define a record understand that a record is a collection of related fields;
(e) Define a file; understand that a file is a collection of related records;
(f) Uses of files
  • master file
understand that a master file is a permanent file kept up to date by applying the transactions that occur during the operation of the business;
  • transaction file
understand that transaction files contain detail of all transactions that have occurred in the last period of processing;
  • archive file
understand that an archive file is kept for legal reasons and is stored off-site;
(g) Database understand that a database is an organised collection of related files;
(h) Consider file size  and its implications for storage be aware of limitations and advantages of different storage devices;
(i) The use of compression, its advantages and disadvantages. How data encoded in suitable formats affects file size and ease of retrieval. be aware of the uses of compression for storage of files and its advantages (saving disk space);

understand when compressed files need to be decompressed and be aware of any potential problems this may cause (the need for a decompression program to be present when viewing files)

(j) Physical and software methods of securing data be able to describe a range of methods such as passwords, including identification, authentication and authorisation, encryption, backups, fireproof environments, voice prints, locks, identity cards.
  5.2.5 MANIPULATING INFORMATION
Candidates should:
(a) Organising and updating files understand the reasons for updating files; sorting, editing existing data, adding new data, deleting old data;
(b) How to search and select information be able to:
  • identify suitable sources of information, including files on disks, CD-ROMs, databases, the Internet;
  • search for information using multiple criteria, including operators such as 'and', 'greater than' and tools such as search engines;
  • respond to an enquiry, write a project report, help solve a problem, design or make something.
(c) How to develop information. be able to:
  • enter and bring together information, such as 'copy and paste', or import text, images or numbers.
  • explore information, for example exploring the effects of changing information in a spreadsheet model to make and test predictions;
  • develop information in the form of text, images and numbers, such as link information, organise information under headings, restructure tables, generate charts and graphs from data, select records or fields and prepare reports from a database;
  • derive new information, for example compare information from different sources to reach a conclusion, use formulae to calculate information such as total or average.
(d) How to present information be able to:
  • select and use appropriate layouts for presenting combined information;
  • present information in a consistent way;
  • develop information to suit a specified purpose;
  • ensure work is accurate and clear (by, for example, spell checking) and saved appropriately (within suitable folders etc)
  5.2.6 HARDWARE
Candidates should:
(a) Types of computer have an understanding of their use and application. To include: mainframes (including single processing and parallel processing computers), micro computers, embedded computers, laptops and palmtops;
(b) Computer memory understand bits, bytes, (including kilo, mega, giga, and their relationship), word, disk cache (reason for and use), use and definition of RAM and ROM. Candidates should also be aware of demands on memory made by modern software.
(c) Storage devices appreciate the appropriate use of:
hard disks, floppy disks, CD and DVD ROMs (read only, writable and re-writable), magnetic tape, removable media (zip and jazz), optical disks.
(d) Input devices understand the use and application of:
keyboard, mouse, direct data entry, sound sampling, joysticks, graphic tablets, pens, scanners, sensors, digital cameras, digital video cameras (including web cams), MIDI, photo cells, microphone, specialist devices such as touch sensitive data entry devices, Braille keyboards.
(e) Output devices understand the use and application of:
monitors (screens, VDUs), thin film transistor (TFT), LCD, thin screens (plasma), printers (laser, ink-jet, dot-matrix, thermal), computer output on microfilm, graph plotters, speech synthesis, control interface and actuators, specialist devices such as CNC lathes, millers or embroiders for CAM.
  5.2.7 SOFTWARE
Candidates should:
(a) Operating Systems
Functions of an operating system understand that an operating system is software that:
  • supervises the running of other programs;
  • maximises the use of the computer's memory;
  • handles inputs and outputs and the storage of data;
  • handles interrupts.
Different types of operating systems be able to distinguish between the different types of operating systems and their appropriate use including:
  • single program;
  • batch processing;
  • multi-programming;
  • multi-access;
  • multi-tasking;
  • distributive;
  • real time (process control);
  • real time (transaction processing);
  • parallel processing systems;
  • interactive.
Candidates should also be familiar with the terminology on-line and off-line.
(b) System security understand the differences between security of single-user and multi-user systems;
(c) User interface be able to describe the features of the different types of user interface including command, menu and graphical systems and be able to discuss the advantages and disadvantages of each;
be aware of the terms GUI (graphical user interface), and WIMP (windows, icons, mouse/menu, pointer);
be aware of sound and speech driven interfaces;
be aware of features such as colour, position and common formats.
  5.2.8 NETWORKS
Candidates should
(a) Types of network understand the differences between peer to peer and client/server systems;
appreciate the differences between local (LAN) and wide area (WAN) networks;
be familiar with network topologies including bus, star and ring.
(b) Network security appreciate how data can be made secure on networks, including the use of passwords, encryption, back-ups, file access rights, transaction logs.
(c) Advantages of networks be able to compare the advantages and disadvantages of network systems in comparison with standalone computers.
(d) Data transmission be aware of the software and hardware needed to allow data to be transferred in the following ways: cable, microwave, infra-red, radio, satellite.
  5.2.9 SYSTEMS ANALYSIS
Candidates should
(a) The four stages involved in the analysis, design, implementation and maintenance of a system be able to describe the four stages:
Analysis - 
  • suitable data collection techniques such as interviews, questionnaires, personal observation and existing documentation;
  • data required, processing and outputs from the present system;
  • the concept of a feasibility report outlining the potential costs and benefits of a new or improved computerised system;
  • the features of the system which make it suitable for computerisation.
Design - the identification of: 
  • hardware and software requirements;
  • suitable controls on data and the flow of data through the system;
  • suitable output reports;
  • suitable security systems;
  • appropriate system testing and system documentation;
  • the social implications of the new system;
  • environmental and health considerations;
Implementation - advantages and disadvantages of the following changeover methods and when it would be appropriate to use each one:
  • direct changeover;
  • parallel running;
  • pilot study;
  • phased conversion

System evaluation (the impact on jobs in terms of retraining, redundancies and new jobs; potential social problems and methods of avoiding or resolving those problems).

Maintenance -
  • keeping the new system up to date, error free and the need to improve the system after it is implemented;
  • updating user and technical documentation understanding the need for effective and well-written documentation.

It is expected that testing will take place at every stage

(b) Information systems in society
Data Protection Act know and understand the provisions of the Data Protection Act 1998;
study the Act, the rights of the data subject, the holder and the exemptions;
Copyright law and the Computer Misuse Act know and understand the purpose of the copyright law and the Computer Misuse Act.
study the Act and identify new crimes created and the implications for computer users.