ILIAD is an expert system which can be used as a diagnostic consultant, a reference tool, and an educational system all in one. The ILIAD knowledge base covers more than 1,200 diseases in the fields of internal medicine, pediatrics, dermatology, psychiatry, obstetrics and gynecology, peripheral vascular diseases and sleep disorders and provides treatment protocols for each.

The systems data dictionary contains 1,500 syndromes and treatment protocols and 11,900 findings, which describe the diagnostic elements used in the system. More than 1,400 digitized images are included for reference. ILIAD offers three primary operating modes: consultation, simulation and reference.

1. The consultation mode allows the user to enter findings, such as symptoms, physical signs and laboratory test results for actual patients. Then, ILIAD generates a different list of diagnoses ranked by likelihood, also providing cost effective suggestions for confirming or ruling out any diagnosis on the differential list. Once a diagnosis is made, ILIAD provides treatment suggestions for every diseases in its knowledge base.
   
2. As an educational tool, ILIAD can generate a variety of simulated patient cases that can help students to practice and test their diagnostic skills by providing them with an opportunity to study many cases that they might only seldom encounter in practice. In this mode, ILIAD evaluates the students differential diagnosis and work-up strategy.
   
3. The reference mode provides the user with the ability to browse ILIADS extensive medical reference library.
   
   

ILIAD for Windows (CD-Rom)
ILIAD for Macintosh (CD-Rom)

ILIAD has originally been developed at the University of Utah by Homer R. Warner and collegues, and co developed by Applied Medical Informatics.