Please go to this link and scroll down to page 5 to see the answers for abbreviations and symbols.
http://webcache.googleusercontent.com/search?q=cache:3ae71VX2YHsJ:scu.edu.au/teachinglearning/download.php%3Fdoc_id%3D12770%26site_id%3D301%26file_ext%3D.pdf+&cd=2&hl=en&ct=clnk&gl=ca
Millie
