Computing - Fundamentals of a computer system
- Created by: 11APhillips
- Created on: 10-02-16 16:14
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- Computing: Fundamentals of a Computer System
- Computer Systems
- Everywhere (dishwasher, a/c etc)
- Input, process, (STORAGE), output
- Input Devices: Mouse, keyboard.
- Output Devices: Monitor, speakers, headphones etc
- Types of Computer system
- General purpose - can be used with several applications - Desktop pc
- Dedicated - Used for a specific purpose - dishwasher
- Expert - Designed to act like a human expert
- Control - Used to control machinery - an industrial process etc
- Embedded - One of many systems - Sat nav
- Management information - Used to collect information for a boss
- Standards
- De Facto - Came about through common usage - Microsoft Word file type
- De Jure - By law - PDF file type
- Industry standards - By a non commercial organisation - International standards organisation
- Propriety standards - Owned by organisation - Apple products only work with other Apple Products
- open standards are publicly available ad produce collaboratively - HTML
- Reliability
- Can be a matter of life and death like a diagnosis machine
- Data Integrity - Data being accurate and consistent throughout its life
- Testing can uphold this, which tries to find errors. It is never 10% effective because it is time consuming, expensive, and software is complex
- Ethical And Legal Issues
- Ethical is morally right and legal is about following the law
- It protects against things like fraud, unfair charging for goods, terrorism, unauthorised access to sensitive information
- Cyber crime is crime committed with the aid of computers
- Environmental issues
- Computers contain dangerous substances when released: Cadmium, beryllium, flame retardants and lead.
- Computers are sent to developing countries for disposal as there are no regulations
- Energy used can be reduced by : virtual servers rather than digital, solid state storage, automatic standby switching, optimum a/c, efficient cooling, modern monitors
- Computer Systems
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