Please post comments regarding any errors you've encountered, suggestions for improvement or questions. Your comments will help make future versions of the key more accurate and easier to use for everyone.
Scratchpads developed and conceived by (alphabetical):
Ed Baker,
Katherine Bouton
Alice Heaton
Dimitris Koureas,
Laurence Livermore,
Dave Roberts,
Simon Rycroft,
Ben Scott,
Vince Smith
Please post comments regarding any errors you've encountered, suggestions for improvement or questions. Your comments will help make future versions of the key more accurate and easier to use for everyone.