Hi If it's of any use, you can go to my website at: www.computing.dcu.ie/~dfitzpat/ca592 I teach a second semester course in algorithms and data structures, and all the course material is available. Note that some is in PowerPoint and some is in PDF but feel free to take what you need. Will thanks a lot for the links in your various messages, they will be extremely beneficial additions to my "useful Links" section. Dónal