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| Numbers and letters without purpose |
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| Data with meaning and purpose |
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| Gives an answer that expresses an opinion |
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| Collection of information held together in an organised way. |
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| Paper based database e.g. Address, phone book and yellow pages. |
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| Disadvantages: Storage, Time consuming, Hard to amend or change and information could get destroyed. |
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| Computerised databases e.g. Search engines, electronic registers, police. |
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| Advantages: Hold lots of data, fast to find info, Easily amended, Make backups, Stored safely and preform analysis on data. |
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| Repeating data unnecessarily |
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| All data stored in one large table |
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| Data is split up into groups then separate tables are made. |
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| Key that uniquely identifies a field. |
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| Text, numbers, symbols is Alphanumeric. |
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| E.g. Forename, Address, Phone numbers. |
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| Number (whole or decimal) |
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| Currency (£, $ and two decimal places) |
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Long date, Medium date, short date.
Long time, Medium time, Short time. |
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| Automatically increases by 1 as each record is added. |
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| Restricted to two choices. |
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| E.g. Email, websites and email addresses. |
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| Don't make mistakes e.g. Length check and presence check. |
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| Correctness of data and measures to ensure correctness. |
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| Scanner, Track ball, Light pen, Digital camera, Qwerty keyboard, mouse and touch pad. |
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| Direct data entry devices |
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| Barcodes, Magnetic Ink Character Recognition, Optical Mark Reader, Optical Character Reader and magnetic strip. |
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| Copyright and Patents Act |
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| Prevents ideas being stolen from rightful inventors, covers the software and the code. |
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| One copy of software per machine |
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| Mostly used by companies. Multiple copies of the software. |
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| As many copies as user wants as long as it's on the same site. |
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| Pay annual payment, not owned but gets upgrades of the software. |
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| Free but usually older versions of the software. |
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| Try it before you buy it. |
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| People who make tracks available for download |
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| Optical Character Recognition. Uses scanner to produce image of a document. |
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| Optical Mark Recognition. Software recognises position of black marks, good for marking tests. |
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| Magnetic Ink Character Recognition. Used by banking industries. |
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| Cathode Ray Tube. Bulky, Glass screen, gives off heat, loud. |
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| Thin Film Transmitter. Replaced CRTs, looks nicer, less space, less heat, quicker, easier to damage, colour and contrast not as good. |
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Quiet, high quality, large number of sheets printed, expensive, bulky.
Uses toner fused on paper by heat and pressure. |
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Cheap, Black and white and colour, Home use, More compact, Noisier than laser, Ink can smudge or dry out.
Uses cartilages of ink, flows through nozzle. |
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| First type, 'Impact printer', Noisy, gives carbon copies, Cheap, robust, slow, poor quality. Print head has grid of pins that hits a carbon ribbon. |
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| Type of printer that draws images using a lower able pen. Used by Engineers, architects and map makers. |
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| Hold paper still while pen moves. |
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| Roll paper over a cylinder. |
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| Mixture of Flatbed and drum plotters. |
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| 8 bits. Represented as 0 or 1. |
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| Read Only Memory. Non-volatile. Used in operate systems and is known as BIOS software. |
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| Random Access Memory. Volatile. Part of RAM allocated for clipboard. |
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| Special type of memory. Part of CPU. Smaller than main memory, Processor checks cache before main memory. |
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| Storage device. Magnetic read and write head creates 1 and 0s. 120 GB. |
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| 1.44 MB. Needs formatted before use. Portable. |
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| 100 MB. Data is compressed. needs separate drive. |
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| Compact Disk-Read Only Memory. Once data has been burned can't be wiped. Optical Storage devices. 650 MB. |
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| Read and write to the optical disk. Read normal CD-ROMs. Two types of CD-ROMs: WORM (Write Once Read Many). Magneto (similar to hard drive). |
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| Digital Versatile Disk. Optical storage device. 4.7GB. Record 120 mins. Read by CD-ROM disks. |
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| Terabytes of data. Relatively cheap, Long time to back up. |
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| Digital audio tape. Magnetic medium. 60 GB. Used for backup. |
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| Uses USB plug to connect to computer. Similar to RAM, behaves like ROM. 512 MB to 4 GB. |
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| Optical storage medium, huge definition graphics. Huge capacity. |
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| Solid state memory, memory sticks based on flash memory. |
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| Uses computers hard drive to store some data that would have been stored in RAM. |
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| Group of computers connected together. |
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| Local Area Network, fairly close together generally in same building. |
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| Wide Area Network, spread over larger area. Use global communications to connect the computers. E.g. Internet. |
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| Small piece of software that reproduces by attaching itself to other programs. |
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| Hyper Text Markup Language. Code web pages are written in. |
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| Collection of webpages on a particular topic. |
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| Document written in HTML code. |
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| Picture or text that takes you to another page. |
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| Area on a webpage that lets you jump to another page. |
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| Use of sensors to measure and record data at regular intervals. |
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| Detects and measures a physical quantity. |
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| Massive Multiplayer Online Role Play Gaming. Take on roles of fictional characters. |
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| Computer Misuse Act (1990) |
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| Designed to stop unauthorised access. |
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| Health and Safety At Work Act |
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| Employers have to look after health and safety of employees. |
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| Comma, Separated, Values. Imported directly into spreadsheets or databases. |
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| Rich Text File. Transfer data between different applications. |
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| Joint Photographic Experts Group. Graphics image file. |
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| Moving Picture Experts Group. File format for moving pictures. |
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| Tagged Image File Format. Stores bitmapped images. |
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| Graphics Interchange Format. Holds small compressed images. |
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| Text file. Formats like bold. |
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| American Standard Code for Information Interchange. Plain text file. |
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| Musical Instrument Digital Interface. Sound files. |
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| Compressed CD quality music files. |
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| Makes files take up less space or bandwidth. |
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| Some data is deleted but it isn't detectable. |
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| Software package that allows access to the Internet. |
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| Internet Service Provider. Company that provides Internet access for a monthly fee. E.g. BT, SKY. |
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| MOdulator DEModulators. Connects computer to telephone line. |
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| Rate that data can be transmitted down a communications line in a given period od time. |
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| Public Telephone Service Network. Dial-up connection. |
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| Asymmetric Digital Subscriber Line (broadband). |
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| Integrated Services Digital Network. Must dial-up to connect. |
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| Fibres of glass carry signals as pulses of light. |
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| NO cables, can connect from anywhere in the world. |
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| Transmission Control Protocol. |
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| Protocol used on the Internet. |
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| Piece of hardware which connects a LAN to the Internet. |
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| Private Network website within an organisation. |
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| Recipients can't see the other recipients email. |
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| Recipient receives a copy of all the recipients. |
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| Large collection of similar transactions put together over a period of time and processed in one go. |
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| Collection of records containing info on customers. |
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| Collection of transaction records containing info about aspects of records held in the Masterfile. |
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| Transaction are captured and processed almost simultaneously. |
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| Any image-related file still or animated. |
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