1.1.3 Input, output and storage

A device which allows data to be entered into a computer system for processing.

A device which presents the results of processing in a form understandable to humans.

A type of storage device with magnetised dots that can be created, read or erased on the surface of it by electromagnets. A read/write head is used to read the surface of this material. Ex: HDD, magnetic tape, floppy disks -Lower price per GB -Has a large capacity -Has slower read/write speed -Moving parts makes it less durable -High power consumption -Not portable

Solid state devices store data using semiconductors. No moving parts are required. Ex: SSD, SD card -Higher read/write speed -More durable due to a lack of moving parts -Portable -Lower power consumption -Higher cost per GB -Can have a higher capacity, but very expensive

Optical devices are read from and written to using lasers. Ex: CDs, DVDs, Blu-ray -Cheap -Portable -Slow access speeds -Small capacity -Lack durability

Random Access Memory refers to temporary storage of programs currently in use. It is volatile.

Read Only Memory is non-volatile and used for storing the BIOS.

The concept of storing and retrieving data permanently on a physical storage device in a remote location, rather than locally. If it’s stored over the internet in the cloud it can be called cloud storage.

-Data can be accessed at any time from any device -Data can be easily shared without the need for removable media transfer -Easy to collaborate -Often has a large storage capacity available, or options to pay for more

-Can be expensive -If connectivity is poor, access times can be slow -Internet connection is required to access data