Thursday, 26 September 2013

CPU For 7 Year Olds

Inside your computer there is a mythical entity called A Central Processing Unit it is not very smart and he has a terrible memory and when you want to do stuff such as printing repetitively he would have two inputs 1.) print and 2.) goto 1 in the RAM tray he would have to go into the ROM tray and see how to print then he would print and go to his next instruction in the RAM tray It says goto 1 he would go to 1 and 1 is print he would do this over and over until the computer is switched off.


that's why CPU has an extremely sad life.

Thursday, 19 September 2013

2.) explain the diffrence between proprietary and open standards.

proprietary standards are standards owned by accompany and these are that company's standards making it simple for people because they know what to expect open standards are publically available and can be edited by the public.

 

the main difference is that one is exclusive to the company and can only be edited by the company and the other is open to the public and can be edited by anyone.

ethical considerations
these refer to what is right and wrong
the privacy and security parts of a system

environmental considerations
disposal of computers needs top be cleaner and they need to use less power

legal consideration
defined by laws
hacking and such
proprietary standards
these standards are owned by a company e.g windows
advantages:
look and feel familiar
work in a predictable way
be maintained by one company

industry standards
standards agreed by industry

de facto standards
standards developed by common usage

open standards
they can be edited by users

Thursday, 12 September 2013

An embedded system is a special-purpose system in which the computer is completely encapsulated by the device it controls. Unlike a general-purpose computer, such as a personal computer, an embedded system performs pre-defined tasks, usually with very specific requirements. Since the system is dedicated to a specific task, design engineers can optimize it, reducing the size and cost of the product. Embedded systems are often mass-produced, so the cost savings may be multiplied by millions of items.

some examples are :
Microwave
Washing machine
Car

Thursday, 5 September 2013

phone lines used to be operated by hand and workers would connect different wires to different ports.

clothes used to be washed by hand before washing machines existed or they could use machines operated by hand.

A computer system is made up of lots of parts and takes inputs processes them and makes outputs it is also programmable.