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- I.C.s can do many things. Some are
- R.O.M. chips. These are Read Only
- Memory. Memory of this sort is
- like a newspaper. You can read it
- as often as you like, but you
- can't change the news.
- Others are R.A.M. chips. RAM
- stands for Random Access Memory.
- These chips can be told something
- and will remember it. If you tell
- them something different, they will
- then remember the new information.
- They only work when the power is on.
- If you turn the computer off, the
- RAM chips forget everything.
- Other chips are decision-makers.
- Their individual thinking power is
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- limited, but they team up to control
- the operation of your computer.
- There is one special I.C. chip
- called the C.P.U., which stands for
- Central Processing Unit. It is often
- the largest bug in the box, with the
- most legs. Almost every bit of
- information the computer handles
- is controlled by this chip. Intel
- is the most famous manufacturer of
- CPUs for IBM-compatible computers.
- In PC-class machines the Intel CPU
- model number is 8088. In XT com-
- puters it is 8088-2. In AT-class
- machines it is 80286, in '386'
- computers it is number 80386 and in
- '486s'... you guessed it. (80486)
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