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33 Cards in this Set
- Front
- Back
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what is a computer system made up of |
hardware software |
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what is a computer system |
A computer system is one that is able to take a set of inputs, process them and create a set of outputs. This is done by a combination of hardware and software. |
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what does hardware mean |
physical components e.g. keyboard anything you can touch |
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what does software mean |
programs including os and application software e.g. presentation or spreadsheet |
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what does the cpu do |
process data. searching, sorting, calculating decision making |
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what performs calculations fetch decodes and executes program instructions |
the cpu |
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what is an embedded system |
a computer integrated into another device such as a mobile phone washing machine alarm or tv |
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what are the 7 things which make a computer system important |
safety travel business education retail entertainment communication |
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why are computers important in safety |
monitor and control nuclear reactions |
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why are computer systems important in travel |
satellite navigation autopilots |
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why are computer systems important in business |
transactions moving funds around the world electronically |
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why are computer systems important in education |
aid distance learning maintaining info like grades |
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why are computer systems important in retail |
self service barcodes connected to computer = faster keep track of stock |
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why are computer systems important in entertainment |
games music ebooks movies |
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why are computer systems important in communication |
emailing forums messaging fb teleconferencing |
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what are professional standards |
rules everyone follows in developing computer systems |
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give an example of professional standards |
the usb ports / cables all produced to the same specifications |
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why are professional standards followed
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so another programmer can change a code without meeting original programmer |
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what do professional standards allow a programmer to do |
modify someone else program move to different company without re learning standards work in team at same time |
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what are the 4 categories of professional standards |
open standards proprietary standards industry standards de facto standards |
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describe open standards |
publicly available and flexible free wealth of info available |
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describe proprietary standards |
defined by a particular company large enough to dominate market |
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describe industry standards |
agreed by number of organisations formally defined sets of standards that specify how hardware or software from different developers interacts |
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describe de facto standards |
evolve from what happens to work well emerge from practice for example the qwerty keyboard |
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what are the 3 considerations for a computer system |
ethical environmental legal |
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what are the ethical considerations |
government to store electronic profile of dna cheap labour in foreign countries not everyone has access to computer financial, political , disability reasons |
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what are the 4 laws for computer users |
computer misuse act data protection act copy rights act health and safety at work act |
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what is the computer misuse act what is hacking |
hacking illegal hacking gaining access to computer without permission by stealing password |
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what is data protection act |
if you store details of a person required to keep it safe cannot share with anyone else |
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copyright act |
illegal to copy without owners permission |
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health safety act |
employees responsible for workers cables trip hazards too much time spent at computer eye strain poorly positioned chair monitor not eye level |
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what are the negative environmental impacts |
requires raw material and energy require energy to run - fossil fuels burnt not easy to dispose of landfill space |
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benefits of computer environmental |
communications sent electronically doesn't waste ink paper people work at home don't travel less fuels industrial operations are more efficient saves energy less polluting |
