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
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
An output device communicates information from the computer to the user.
E.G Head-up displays, 3D printers, speakers
LCD: liquid crystal display
save you files to a hard disk as your are working with them.
DVDs: digital versatile discs
A small box inside the computer case that ensures that power is supplied to each component in an appropriate form
UPS: uninterruptible power suply
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 are tiny electrical circuits made up of millions of transistor switches, mounted on a silicon chip, that control the flow of electrical signals.
Smartphones have increased in popularity as they now provide many more functions than just phone services.
A personal computer is a computer that can perform all of its input, processing, output and storage activities by itself
A servers can be any networked computer located anywhere that has appropriate server software installed
They can store vast amounts of data and are accessed with terminals or personal computers.
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 is a systematic, step by step, elimination process for finding a system fault
Care and maintenance
Define and analyse the problem
Design possible solutions