There is a variety of secondary storage devices such as magnetic hard disk these are the most common type of secondary storage. Solid State memory is much better than magnetic hard disks because they are much faster.

Input And Output

What Is An Input Device?



An Example Of An Input Device Could Be a Keyboard.

Where As an Output Device Could Be A Monitor

Binary Logic

What is Binary?
Binary is a number system using only 0 and 1 to represent all number.
Computers use binary because 1 and 0 can be represented very easily using simple electronic components set into the ON or OFF state (a switch).

Logic Gates
There are three main gates.
NOT
AND
OR
They can be combined.