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welcome to my video tutorial series for the OCR entry level certificates in computer science this is the first lesson covering contents for test one and looks at the components of a computer system in this lesson it is may aim to help you understand what a computer system is and to be able to classify components in a computer with respect to inputs outputs and storage devices lets begin so what is a computer system simply a computer system is an electronic device that has a method of inputting information our data has a microprocessor to process this information our data and has a method of outputting this information our data so we as humans can understand it there are two types of computer system embedded systems and personal computers embedded systems are electronic devices that contain a microprocessor within them and this processor contains pre-programmed instructions that it must follow these instructions usually cannot be changed all embedded systems will have some form of inp