American Society of Anesthesiologists - The largest professional Anesthesia organization in the world. Has guidelines to Anesthesia practice and a database of most US Anesthesiologists. Publisher of "Anesthesiology", the most circulated Anesthesia journal.

American Society of Regional Anesthesia - a Web site dedicated to techniques of regional anesthesia. Mostly aimed at the Adult population.

International Anesthesia Research Society - Publisher of "Anesthesia and Analgesia", a widely read peer-reviewed journal.

Canadian Anaesthetist's Society - Publisher of the Canadian Anaesthesia Journal, a more clinically orientated Anesthesia Journal.

American Academy of Pediatrics - Largest Pediatric Organization in the world. Publisher of "Pediatrics", a peer-reviewed journal. Useful guidelines and pediatric advice.

Canadian Paediatric Society - Very useful site for common pediatric guidelines and resources that are of practical help to all parents.