ITGS Key Terms
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| ADC | Device for sampling analog data and producing a digital sample of it.
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| analog data | Continuous data which can be measured, such as the temperature in the room.
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| analog to digital converter | Device for sampling analog data and producing a digital sample of it.
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| BAN | Environmental campaign group that works to reduce the problems caused by e-waste.
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| Basel Action Network | Environmental campaign group that works to reduce the problems caused by e-waste.
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| Basel Convention, The | Environmental agreement regarding e-waste.
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| blade servers | Server design which is modular, allowing systems to be rapidly expanded and reducing power consumption.
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| continuous data | Analog data which can be measured, such as the temperature in the room.
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| CRT | Old, large TV style computer monitors.
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| data centres | Large warehouses of computers that host hundreds or thousands of gigabytes of data.
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| data layers | Layers of information added to a Geographical Information System.
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| data logging | Automatic recording of data using sensors.
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| digital data | Discrete data which can be counted.
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| digital footprint | An individual's effect on the environment due to e-waste.
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| digital divide | The idea that money, language, education, or infrastructure creates a gap between those who have access to information technologies and those who do not.
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| digitisation | The process of converting analog data into digital computer data.
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| discrete data | Discrete data which can be counted.
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| donation schemes | Schemes used to find additional uses for obsolete computer equipment to extend it's useful life.
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| e-waste | Discarded electronic equipment that is either broken or obsolete.
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| electronic waste | Discarded electronic equipment that is either broken or obsolete.
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| Geographical Information System | A system which allows layers of data to be placed on map data to visualise and analyse it. For example, crime rate figures can be layered on a map of a city.
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| geotagged | Adding tags to data (such as an image) to identify the location in which it was created.
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| GIS | A system which allows layers of data to be placed on map data to visualise and analyse it. For example, crime rate figures can be layered on a map of a city.
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| Global Positioning System | System of satellites that allows a user to determine their position on Earth using a special receiver.
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| GPS | System of satellites that allows a user to determine their position on Earth using a special receiver.
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| GPS receiver | Part of the GPS system which calculates its distance from satellites in space.
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| laser imaging | Remote imaging method that users laser light, often used by satellites.
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| LCD | Newer style "flat screen" monitors.
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| LEDC | Countries to which electronic waste is often shipped for unsafe recycling and disposal.
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| Less Economically Developed Country | Countries to which electronic waste is often shipped for unsafe recycling and disposal.
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| Lidar | Remote imaging method that users laser light, often used by satellites.
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| life cycle (hardware) | For computer hardware, the period of time from its manufacture, through its use, until its eventual disposal.
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| location based service | Any service (e.g. web page content) which varies according to the user's location.
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| MEDC | Countries which are often a significant source of electronic waste.
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| More Economically Developed Country | Countries which are often a significant source of electronic waste.
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| planned obsolescence | Idea that IT equipment is designed to have a short life expectancy before failing or becoming obsolete.
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| power settings | Operating systems to affect the power consumption of a computer.
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| radar | Remote imaging method used by satellites.
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| recycling | The process of reclaiming valuable elements from waste electronic equipment, often done unsafely in developing countries.
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| reduce | The 'R' concerned with preventing e-waste problems by producing less waste equipment and using fewer harmful chemicals.
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| redundant systems | System which will take over the role of a primary system if it fails.
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| remote sensing | Techniques used by satellites to image the Earth.
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| refurbish | The 'R' concerned with finding additional uses for equipment which is obsolete but not broken.
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| reuse | The 'R' concerned with finding additional uses for equipment which is obsolete but not broken.
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| RoHS | A law which limits the harmful chemicals that manufacturers are allowed to put into their electronic equipment.
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| Reduction of Harmful Substances | A law which limits the harmful chemicals that manufacturers are allowed to put into their electronic equipment.
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| sample precision | During digitisation, the number of bits used to represent each sample.
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| sample rate | During digitisation, the number of samples taken per second.
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| sampling | The process of converting analog data into digital computer data.
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| sat nav | Portable GPS receiver device often used in vehicles.
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| satellite imaging | The use of sensors on satellites to measure or record information, usually about the Earth.
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| satellite navigation system | Portable device that uses GPS to plot the user's position.
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| sensors | Input devices used to measure physical traits, such as sound, heat, or light.
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| sonar | Remote imaging method used by satellites.
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| speed throttling | Reducing a processor's clock speed to save power when not in use.
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| take-back scheme | Scheme operated by IT manufacturers to accept customers' old hardware for recycling at its end of life.
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| virtual globe | A 3D software map of the Earth, usually with layers of information added, similar to a GIS.
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| virtual machines | A software implementation of a computer system, allowing one physical computer to run several "virtual computers", each with their own independent operating system and application software.
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| virtualisation | The process of using several virtual machines running on one computer to replace several separate physical computers.
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| visualisation | Producing graphs or animations based on computer data, to help understand and analyse it.
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| WEEE | A European law which requires electronic equipment manufacturers to accept back their equipment for recycling at its end of life.
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