Acknoledgements
The ESTA system and its documentations were created by Helle Harboe with the help of Lars Bo Steffensen, Lars Malmgren-Hansen, Leo Jensen, Finn Gronskov, Lars H. Jacobsen, Henrik Zangenberg, Dr. Micheal Thorne, The University of Sunderland and Micheal Alexander, PDS Atlanta.
Thanks to K. Lavangnananda, University College, Cardiff, who wrote the example 1AID to teach first aid in the UK. Thanks also to Jaisree for writing the HODGE example and to Mrs Audun Tonnesen for allowing the of the SANOCOR knowledge base.