How computers  put together 
How do computers work?  You see computers almost everywhere. An MP4 player for example.  All kinds of computers do 4 things:

(Click on the links and scroll through)  

• Input

• Processing

• Storage

• Output (Output)

Laptops and desktop computers still need a number of things, namely RAM (Random Access Memory) or working memory, ROM , PROM , EPROM and EEPROM . 

These are all PDF files.

​

​

SOURCE: https://nl.wikipedia.org/wiki/Read - only_memory