A-Level Computing#BristolMet Session Objectives# Must identify some common types of computer system Should describe the meaning of a computer system Could explain how data moves around a computer system Work in a group to assemble and boot a Raspberry Pi.

A-Level Computing#BristolMet What are computer systems? TASK 1: List as many computer systems that you can think of (2 mins) Define what it is meant by the term ‘computer system’: A complete, working computer. Computer systems will include the computer along with any software and peripheral devices that are necessary to make the computer function. Every computer system, for example, requires an operating system. ( 9/9/12 Basically it can be any device that has a processor or ‘chip’ in it and turns a given input(s) into a desired output(s).

A-Level Computing#BristolMet Fundamentals of computer systems Computer systems can be put into 3 categories: Personal Computer – designed for one person to use at a time i.e desktop, laptop, smartphone etc Servers – Powerful computers which are used to control networks and share resources. Embedded systems –An embedded computer is a single chip that contains all the elements of a computer i.e input, output, RAM, ROM, CPU etc. They are hidden inside other machines, such as televisions, washing machines etc.

A-Level Computing#BristolMet Fundamentals of computer systems TASK 2: Create a table using the headings and sort your list

A-Level Computing#BristolMet Data Flow Diagram of a common PC TASK 3: Arrange the component blocks and arrows to represent the flow of data around a computer system Processor (CPU) Main memory (RAM) Storage e.g hard disk Input Device e.g keyboard Output Device e.g monitor

A-Level Computing#BristolMet Data Flow Diagram of a common PC Arrange the component blocks and arrows to represent the flow of data around a computer system Processor (CPU) Main memory (RAM) Storage e.g hard disk Input Device e.g keyboard Output Device e.g monitor

A-Level Computing#BristolMet 1. Programs and other files are stored on the 2. The processor loads up a software application by copying it from the 3. New data is entered into the 4. The processor stores the 5. The processor sends 6. The processor saves data to the TASK 4: Join together the sentences which explain how data flows around a computer system when in operation. hard disk storage hard disk into main memory processor via input devices data in main memory data to output devices hard disk storage when instructed to do so Data Flow Diagram Explained

A-Level Computing#BristolMet 1. Programs and other files are stored on the 2. The processor loads up a software application by copying it from the 3. New data is entered into the 4. The processor stores the 5. The processor sends 6. The processor saves data to the Join together the sentences which explain how data flows around a computer system when in operation. hard disk storage hard disk into main memory processor via input devices data in main memory data to output devices hard disk storage when instructed to do so Data Flow Diagram Explained