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what is random access memory ramthis is a volatile memory ie contents are lost when computer is switched off a user can write or delete data and read
electrically erasable programmable read only memory eeproman eeprom is a special type of prom which can be erased by exposing it to an electrical
erasable programmable read only memory epromthis is a special type of prom which can be erased by exposing it to ultraviolet uv light once it has
programmable read only memory proma prom is a memory chip on which data can be written only one time once a program has been written onto a prom its
read only memory romrom holds the instructions for starting up the computer this sort of memory can only be read and cant be altered that implies
voice synthesisloud speakers and special software are used to output information in the form of sound to help blind and partially-sighted people it
explain the term- tracker ball and braille printerstracker balleasier to use than a mouse if people have problems using their arms and hands or if
explain about the voice recognition deviceblind and partially-sighted people can communicate with a computer using microphone and software keyboard
explain in detail about touch screensfor people who cant use a keyboard allowing input also helps people with learning difficulties since icons are
explain the types of hardware used in supermarketsthese use many types of specialist io hardware for instance- bar code readersscanners to read
what is automated information system using this automated information system affords below benefits to the company and customers- system can be
give brief explanation about the keyboardskeyboards are generally not offered as the number of options is limited and owners of the system do not
determine about the information centres airports supermarkets and any application where information needs to be relayed to customers gain advantage
io devices need to be matched up to computer application - computer-aided design graph plotters large screens etc - virtual reality data
determine about the signals to televisionssignals to televisions are now sent digitally thus need a computer to interpret as well as decode these
describe about the digital camerasthe microprocessor would be used to control the below functions for instance- shutter speed- lens focus- flash-
name the numerous household devicesnumerous household devices now use microprocessors to control their different functions the following is just a
state the drawbacks of laptop compared to pcthe main disadvantages of laptops compared to desk top pcs are- they tend to be more expensive to
illustrate the following list of consideration of laptop computersthe following is a list for consideration- the processor must consume as little
explain the major consideration of laptopone of the major considerations when buying a laptop is battery life this can rely on a number of things
laptop computerslaptop computers have the obvious advantage over desk-top computers pcs in that they are fully portable this is of specific value if
illustrate about the macros and give its examplefor instance assume you want some data to be input into a spreadsheet if result of a calculation in
describe the term- macrosa macro is a key or name which signifies a series of commands or key strokes many applications allow single nominated key or
what are the disadvantages of bespoke software - very dependent on suppliers of the software if they go out of business there would be little or
state the advantages of bespoke software - specifically designed for application and hence more efficient and will only contain the features