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Types of computer

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Amy Redman

on 18 June 2013

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Transcript of Types of computer

A desktop computer is a personal computer small enough to fit conveniently in an individual workspace but is not suitable for being moved around often, it is stationary.
Smart phone
Personal digital assitant
A laptop is a portable computer that can be transported anywhere and is therefore very light and a lot smaller than a desktop computer. It can be used in any location.
A tablet is another form of mobile computer that can be transported ery easiely due to the fact that it weighs very little and is very compact. Its like a laptop but a little smaller.
A smart phone is basically a phone that has the capacity to funtion as a computer as well, so it can use the internet and send and recieve e-mails.
A personal digital assisstant, or PDA as they are more commonly known, is a small hand held computer that can be used for planning and organisation of events.
An analogue computer is one that represents infomation by variable quantities like positions or voltages.
What is an analogue computer?
What is a digital coputer?
A digital computer is a device capable of solving problems by processing infomation.
So what is the
difference between analogue
and digital com

The difference between digital and analogue computers

Analog signal is a continuous signal which represents physical measurements. Digital signals are discrete time signals generated by digital modulation.
Analogue is denoted by sine waves where as digital is denoted by square waves
Analogue uses continuous range of values to represent information Uses discrete or discontinuous values to represent information
: Human voice in air, analog electronic devices. Computers, CDs, DVDs, and other digital electronic devices.
Analog technology records waveforms as they are. Digital samples analog waveforms into a limited set of numbers and records them.
Data transmissions:
Subjected to deterioration by noise during transmission and write/read cycle. Can be noise-immune without deterioration during transmission and write/read cycle.
Response to Noise
: Analogue are more likely to get affected reducing accuracy but digital are less affected since noise response are analog in nature
Analog hardware is not flexible. Digital hardware is flexible in implementation.
Can be used in analog devices only. Best suited for audio and video transmission. Best suited for Computing and digital electronics
: Thermometer PCs, PDAs
Analog signal processing can be done in real time and consumes less bandwidth. There is no guarantee that digital signal processing can be done in real time and consumes more bandwidth to carry out the same information.
Stored in the form of wave signal Stored in the form of binary bit
analog instrument draw large power digital instrument draw only negligible power
low cost and portable cost is high and easily not portable
low high order of 100mega ohm
analog instruments usually have a scale which is cramped at lower end and give considerable observational errors digital instruments are free from observational errors like parallax and approximation errors
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