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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.(http://www.webopedia.com/TERM/C/computer_system.html) 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
2.1.1 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)
Storagee.g hard disk
Input Devicee.g keyboard
Output Devicee.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)
Storagee.g hard disk
Input Devicee.g keyboard
Output Devicee.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