secondary storage devices are those that you can take away therefore they aren't always available to a computer a good example could be a DVD Disc

input and out puts devices

One example of an input device could be a mouse or a camera

One example of output device is a screen

23/9/2013

I am able to open a computer and find the ram memory card the hard drive and the CPU

Define a system

A system is a group of parts that work together and have a common purpose, it can contain other systems this is called and embedded system

Standards

proprietary

These are owned by a company any software that runs over it must handle data in certain way and be able to communicate with the operating system.

industry standards

 Standards agreed across the computing industry many of them related to software and allow easy connections between devices like USB connectors

de facto standards 

Those that develop through common usage until they become the accepted way of doing things

open standards

Standards that are available to the public open to be changed by the public

A example of A Embedded computer system is:
Computer software. It is run by the Hardware.

Computer Systems

A Computer System is made up of many parts that work together to complete a purpose, it is programmable, it processes inputs and produces outputs.