Mike, I have done some of these and they can be used on-line at the ACB Web Site (see Capsules). I'll also make them available to download. They are hypertext documents so should be useable on PCs and Macs. There is also a Medical Algorithms project which is very comprehensive. I can't remember the URL, but soneone else might know it or you could try Yahoo. Regards, Martin %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%