Excel Igcse Computer Studies Glossary Essay Example for Free

Excel Igcse Computer Studies Glossary EssayActuator It is a thingamajig that can be operated by signals from a data processor or control governing body causing somatic movement. (E.g. devices for opening windows in a computer controlled ventilation system) Algorithm It is a sequence of instructions intentional to perform a particular task and it is independent of any designming speech. It includes precise details to the highest degree the operations to be performed and in what order. (E.g. pseudo-code or program flow chart) Batch touch on It is a processing that doesnt start until all the data are collected without any needs of human interaction. It uses computer during overnight. (E.g. payroll system, billing, cheque processing) CAD (Computer Aided Design) It is the use of computer system that allows engineers and architects to design new projects by producing drawings.(E.g. designing new cars) Command-line interface It is a set of commands instructed by the us er in order to return with the computer and get the requirements sorted out. Compiler It is a program that converts high-level language into machine language and converts whole program before execution. Cookies It is a text which the user receives when in access to the internet website and gets automatically downloaded onto the users computer and further develops to infect a computer. (E.g. it can be blocked when the user rejects it by setting its restriction on the web page) Data integrity It refers to the accuracy of data.Data-logging It is an automatic capturing and storing of data readings from sensors over a period of time. (E.g. weather forecasting) De-skilling It is replacing a semi-skilled labour with a micro-processing control system. dry out run It is working through a program or a section of a program manually. This is useful for locating errors, particularly run time errors. E-commerce It is an electronic commerce that allows buying and selling goods and funct ion through the internet/computer networks. Either B2B or B2C, they still serve their products. (E.g. on-line shopping, Internet/online banking)H.J.Hong encoding It is a way of preventing data files that contain sensitiveinformation from being used if theyre stolen. technological system It is an application of maudlin intelligence (AI) to a particular area of activity where traditional human expert knowledge and experience are made available through a computer package. (E.g. checkup diagnosis) Generic software It is a type of software that can perform many different think tasks. Intranet It is a communication system, providing similar services to the internet solely within a particular order or organization. It makes it possible to share documents, databases and applications, using the same protocol as the internet. (E.g. more secure data) system of logic gates They are the components used in making logic circuits. Each gate has 1 or more input signals and produces a sin gle output that depends upon the input(s).Simulation It is a study of the behaviour of a system by using a model. (E.g. flight simulator) Structure diagram It is a means of representing the design of a program or system and it demonstrates what happens at a program level Top-down design It is the technic of breakage down a problem into subtasks that are sufficiently simple enough to be written as a self-contained module or procedure. (E.g. allows several programmers to work on the same large task, each(prenominal) module can be tested/debugged separately) Validation It is a check on the data input and detects any data that is unreasonable and unacceptable.Video-conferencing It is a form of an electronic communication through Internet for volume who are geographically separated to transmit audio and video data. (E.g. meetings held at different locations) Virtual worldly concern It is a computer simulation that uses special interactive devices such as data gloves to create a n artificial environment. (E.g. viewing newly constructed houses/pilot training) Virus It is a program which replicates itself and damages files or data. (E.g. it alters the data on the infected computer without the user knowing it)