1.1.3 Input, output and storage - Ben

Pits (0s) and Lands (1s)

By using two magnetic states, polarised (1s) and unpolarised (0s).

A flash drive stores information using flash memory, where data is saved in blocks of memory cells that retain electrical charges even without power.

Virtual storage refers to the use of disk space as an extension of a system’s memory, providing an illusion of more available memory than physically exists.

Flash storage (SSD)

An output device is hardware that receives and displays or produces data from a computer, such as a monitor, printer, or speakers

Any peripheral device that can accept data, presented in the appropriate machine readable form, decode it and transmit it as electrical pulses to the CPU

Uses a section of the hard drive to act as RAM when the space in main memory is insufficient to store programs being used.

RAM is your computer or laptop’s short-term memory. It’s where the data is stored that your computer processor needs to run your applications and open your files

ROM is non-volatile, permanent data that, normally, can only be read, not written to. ROM contains the programming that allows a computer to start up or regenerate each time it is turned on

Cheap light weight portable

Can be scratched Low capacity

No moving parts high storage small size Durable

expensive

High storage capacity cheap

Moving parts fragile large

Any medium (optical, magnetic, solid state and even paper which holds data or programs

used to temporarily hold data and instructions. that the processor is likely to reuse.