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Chapter 2-HARDWARE: includes a range of physical devices-items that you…
Chapter 2-HARDWARE: includes a range of physical devices-items that you can see and touch
2.1 Input, output and storage
Input
An input device collects data from the outside world and changes it into a form that the computer can work with.
E.G keyboard mouse touchpad
CPU : central processing unit
Output
An output device communicates information from the computer to the user.
E.G Head-up displays, 3D printers, speakers
LCD: liquid crystal display
Storage
save you files to a hard disk as your are working with them.
DVDs: digital versatile discs
Power supply
A small box inside the computer case that ensures that power is supplied to each component in an appropriate form
UPS: uninterruptible power suply
Ports
The ports is the interface, or point of attachment, to the system box.
DVI: digital video interface
USB: universal serial bus
LAN: local area network
ADSL: asymmetric digital subscriber line
2.2 Processing and control
The motherboard: the main item inside the system
Controllers cards:often expansion boards that fit into slots in the motherboard. they include video cards and modern cards.
A video cards, also called a graohics adaptor cards
2.3 Classification of systems
Microprocessors
Microprocessors are tiny electrical circuits made up of millions of transistor switches, mounted on a silicon chip, that control the flow of electrical signals.
Smartphone
Smartphones have increased in popularity as they now provide many more functions than just phone services.
Personal computers
A personal computer is a computer that can perform all of its input, processing, output and storage activities by itself
Servers
A servers can be any networked computer located anywhere that has appropriate server software installed
Mainframe computers
They can store vast amounts of data and are accessed with terminals or personal computers.
Supercomputers
A supercomputer is the fasted and most expensive of all computer. they will contain thousands of processors that can share jobs and work in parallel
2.4 Hardware solutions
Troubleshooting
Troubleshooting is a systematic, step by step, elimination process for finding a system fault
Care and maintenance
Developing solutions
Define and analyse the problem
Design possible solutions
Producing solutions
Evaluation