Frist of all, you need to know if is this what you want to learn for real.
Second, Basics:
Numeral System ( binary, hexadecima, octal):
http://en.wikipedia.org/wiki/Numeral_system
| Full Text Notation | Abbreviation | Number Base |
|---|---|---|
| binary | bin | 2 |
| octal | oct | 8 |
| decimal | dec | 10 |
| hexadecimal | hex | 16 |
http://en.wikipedia.org/wiki/Binary_numeral_system
http://en.wikipedia.org/wiki/Hexadecimal
http://en.wikipedia.org/wiki/Octal
Converting each other:
http://www.robotroom.com/NumberSystems.html