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A451 Topic 1: Fundamentals of a Computer System
- Lesson 1
- What is a computer system?
- Integrated collection of computer parts
- Work together for a common purpose
- Work together for a common purpose
- Able to work together with other computer systems
- Many subsystems in a single device
- The way they communicate is called 'Interconnections'
- The way they communicate is called 'Interconnections'
- Many subsystems in a single device
- System boundary
- Separates the system
from what it's not
- This is done while
processing
- This is done while
processing
- Separates the system
from what it's not
- Systems can also be natural
- Based on processing data
- Producing information
and outputs
- Producing information
and outputs
- Fast and reliable
- Programmable
- Integrated collection of computer parts
- Devices
- Input
- Keyboard
- Mouse
- Allow the user to
input information
into the computer
- Stored in binary form
- Stored in binary form
- Processes
- The operation before the
required result
- Calculations on numbers
- The operation before the
required result
- Keyboard
- Output
- Result of the computers
processing shown
- Result of the computers
processing shown
- Input
- Types of computer systems
- Dedicated System
- This type of system has a dedicated purpose
- Found in most electronic devices
- Written for a particular purpose
- Found in most electronic devices
- This type of system has a dedicated purpose
- General purpose system
- This supports most types of software applications
- Kernel
- Lowest level of the OS
- Contains the hardware of the OS
- Lowest level of the OS
- This supports most types of software applications
- Embedded system
- Part of a larger system
- Can be used to
control other systems
- Car ABS
- Car ABS
- Part of a larger system
- Control System
- Controls Machinary
- Don't produce an output for
humans to read or respond to
- Controls Machinary
- Expert System
- Act like humans
- They have three parts
- Knowledge Base
- Database of results and outcomes
- Database of results and outcomes
- Inference Engine
- This judges the knowledge base
- This judges the knowledge base
- Interface
- Allowing humans to
access the system
- Allowing humans to
access the system
- Knowledge Base
- Act like humans
- Management Information system
- Brings together all data of an organisation
- Covers technology, people and data
- Decision supporting
systems is an example
- Covers technology, people and data
- Allows managers to make sensible decisions
- Brings together all data of an organisation
- Dedicated System
- Reliability
- Many people around the
world rely on computer
systems day by day
- If the system is not reliable
data could be lost or stolen
- Many IT systems as people don't
know how to use them
- Billions of pounds can be
put into a system and it
not operate properly
- Many people around the
world rely on computer
systems day by day
- Testing
- What is a computer system?
- Lesson 2
- Reliability
- AVAIL
- MTTF
- AVAIL
- Reliability