MEMORY
Published on Dec 21, 2015
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PRESENTATION OUTLINE
Random access memory (or simply RAM) is the memory in a computer that is used to store computer programs while they are running any information the programs need to do their job.
Information in the RAM can be read and written quickly in any order.
Usually, the RAM is emptied every time the computer is turned off. It is known as 'volatile memory'.
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ROM is a memory chip where essential system instructions (BIOS) are permanently stored.
The data held on ROM can be read but not changed. This is done during manufacturing.
ROM is non volatile, meaning that the data stored on it will not be lost when the computer is switched off.
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Cache is a form of memory.
It is used to speed up the way applications work.
For example, Internet Explorer uses a cache to store all the web pages that you have visited recently including all of the pictures, sounds, videos and so on. So, next time you visit that page it will check to see if it is available in the cache. If it is, then it will instantly load the page from the cache rather than having to download it again from the Internet. This makes it much faster when you browse the Internet as it doesn't have to fetch every single file every time.
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