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Transcript of Computer systems in the modern world 2-1-1 Fundamentals of computer systems 2 GCSE OCR Computing...
![Page 1: Computer systems in the modern world 2-1-1 Fundamentals of computer systems 2 GCSE OCR Computing A451.](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649e4c5503460f94b418f8/html5/thumbnails/1.jpg)
Computer systems in the modern world
2-1-1 Fundamentals of computer systems
2
GCSEOCRComputingA451
![Page 2: Computer systems in the modern world 2-1-1 Fundamentals of computer systems 2 GCSE OCR Computing A451.](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649e4c5503460f94b418f8/html5/thumbnails/2.jpg)
Objectives• Learn about the role of computers in today’s society
• Consider the influence of computers on your life
• Understand how computer technology affects everyone in modern society
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
The growth of computer technology
• In the 1980s, a few people began using a PC on their desk
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
The 1990s• When people began surfing the web, they were
using three or four computers at once
• one to look at the web page,
• one to retrieve the web page
• and a couple more to pass information over the Internet
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
And today…• Today, you probably routinely use 20 or more
computers simultaneously without even being aware of most of them!
• What computers are you using when you are
• At home
• At school
• In town
• In a car
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Our world is built on computers!
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Worksheet 2• Identify three different computer systems within one
industry sector
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
The importance of computer systems• Fifty years ago, very few organisations relied on
computers for anything other than the payroll system
• Computers did not impact on the way people communicated, shopped, banked, travelled, learned, etc.
• Would it be possible to put the clock back?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Relying on computer systems - for food…
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… for food• As society changes over time, old skills become
obsolete as new, more convenient ways of doing things become the norm
• We don’t have to hunt, fish and dig up wild roots to feed ourselves any more. If the whole food distribution system broke down, could we feed ourselves?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… for travel
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… for travel• Just 100 years ago, people mostly used to walk or
cycle to work
• How do people get to work now?
• Are computers involved?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… for finding our way around
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… for finding our way around• Can you read a map?
• Many car drivers are totally dependent on their Sat Nav systems
• The captains of ships no longer navigate by the sun and the stars
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… in hospitals
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
… in hospitals• What would happen if all the computer systems in a
hospital ceased to function?
• Would the same be true of a hospital in a remote corner of the third world?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
…for monitoring the environment
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
…for monitoring the environment• In many parts of the world computers are constantly
monitoring for signs of earthquakes, tsunamis, hurricanes, floods and other natural disasters
• What sort of environmental monitoring takes place in the UK?
• Why is this monitoring important?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
…for distribution of goods and raw materials around the world
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
…for distribution• Almost anything can be sent to different parts of the
world
• Name some of the things that we import into the UK
• How are computers involved?
• What would happen if the computer systems were unreliable?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Reliability of computer systems• When thinking about the importance of reliability in
computer systems, think about what a breakdown would mean:
• Is it life threatening?
• How many people are affected?
• Are they merely inconvenienced, or does it threaten their livelihood in some way?
• Anything else?
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Worksheet 3• Complete Tasks 1 and 2
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Reliability measures• Mean Time Between Failure (MTBF)
• System availability or downtime
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Disaster recovery• Backups
• Disk mirroring (RAID)
• Hardware sourcing/plans
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Computer systems in the modern world
2-1-1 Fundamentals of computer systems
Worksheet 3, Task 3• Give another example where failure of a computer
system might be catastrophic, and briefly explain why