Base 64 and Youtube

We use base 10 and computers use base 2, aka binary. There are all sorts of number systems and here is another one to think about and it's how Youtube doesn't run out of short urls.

History of Number Systems Investigation - some links

Where to begin when looking for information on different number systems?

You could ask your parents - maybe they know about a cool system for numbers and counting. 

You could ask your librarian - there are books about mathematics!

There are some sites online too. Ms. O'Hara and I have found some sites to share with you.
If you search, use good search terms. One of my favourites is "for kids". I use this in almost every search I do (:

Binary at mathisfun http://www.mathsisfun.com/binary-number-system.html
Counting on your fingers with binary http://www.mathsisfun.com/numbers/binary-count-fingers.html

Roman Numerals http://www.ducksters.com/kidsmath/roman_numerals.php

Archimedes Lab http://www.archimedes-lab.org/numeral.html

Numberphile is a wonderful Youtube channel

This one has a long list of number systems and labels their complexity or simplicity with happy and not so happy faces.   http://gwydir.demon.co.uk/jo/numbers/comparison.htm  

Another page on this site is http://gwydir.demon.co.uk/jo/numbers/index.htm with a few famous number systems.

This is a bit more ‘wordy’: http://www.math.wichita.edu/history/topics/num-sys.html

This site had some interesting facts, but it might be a little challenging with its sophisticated matheamatical language http://mentalfloss.com/article/31879/12-mind-blowing-number-systems-other-languages