Computer Hardware

James Hawksley
Mind Map by James Hawksley, updated more than 1 year ago
James Hawksley
Created by James Hawksley over 4 years ago
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Description

Mind Map on Computer Hardware, created by James Hawksley on 10/06/2015.

Resource summary

Computer Hardware
1 Devices
1.1 Input
1.2 Output
1.3 Hybrid
1.4 Assistive Technology
2 Secondary Storage
2.1 Purpose
2.1.1 Non-volatile device that holds data until it is deleted or overwritten.
2.1.2 Secondary storage is about two orders of magnitude cheaper than primary storage.
2.2 Types
2.2.1 Magnetic
2.2.1.1 Examples
2.2.1.1.1 Magnetic tape
2.2.1.1.2 Floppy Disk
2.2.1.1.3 Hard Disk Drives
2.2.1.2 How it works
2.2.1.2.1 It is coated with iron oxide.
2.2.1.2.2 This oxide is a ferromagnetic material.
2.2.1.2.3 As it is a ferromagnetic material, meaning that if you expose it to a magnetic field it becomes permanently magnetized.
2.2.2 Optical
2.2.2.1 How it works
2.2.2.1.1 The spiral bumps on a CD starts in the center. CD tracks are so small that they have to be measured in microns which are millionths
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