Just thought this might be of interest. Pretty interesting reading for anyone who plays slots!

If you go to the IGT website, there's a few interesting articles and papers in the investor news section

Go to their webpage in the following link and select the Introduction to Gaming Guide, then click on the link within the text for their Introduction to Slots and Video Gaming guide

http://www.igt.com/company-information/news-room/press-kits.aspx#tab=4