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determine the types of sensors different types of sensors are used to give real time information to computers frequently an analogue to digital
digital versatile disk dvdthis is an optical system for storing data its similar to cd though typically can hold 47 gbyte of data compared to only
explain in brief about compact disks cdthese are an optical storage media that have basically taken over from floppy disk software is now generally
explain about the flash memoriesthese are re-writable non-volatile memories evolved from eeprom they are generally connected to the usb port on the
mp4 mpeg-4mpeg-4 files are in a format which can hold a mixture of multimedia objects like video audio animation images etc mp4 players again use
determine in detail about mp3 mpeg-3mpeg-3 uses an audio compression technology it compresses cd-quality sound by a factor of about 10 while
external storage systems a number of different types of external memory devices are available now some of these are considered below hard drives
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
illustrate about the digital televisionsmicroprocessor would be used to control the below features for instance- automatically tuning into television
state advantagesof washing machinemain advantages are that these washing machines are fully automatic wash programs are fully stored it makes them
state the features of washing machinesmicroprocessor would be used to control the below features for instance- water temperature- time for every