CDSS
Clinical Decision Support System (CDSS) is a DSS-based Computer Software designed to assist physicians and other health professionals with decision-making tasks, such as determining a diagnosis on the basis of patient data. A working definition has been proposed by Robert Hayward of the Centre for Health Evidence: "Clinical Decision Support systems link health observations with health knowledge to influence health choices by clinicians for improved health care".
The main purpose of modern CDSS is to assist clinicians at the point of care (Berner, Eta S., ed. Clinical Decision Support Systems. New York, NY: Springer, 2007). This means that a clinician will be able to interact with a CDSS when it comes to determining a diagnosis or analysing patient data.
There are two main types of CDSS:
- Knowledge-Based
- Non Knowledge-Based

Links:
http://searchhealthit.techtarget.com/definition/clinical-decision-support-system-CDSS
http://www.healthit.gov/policy-researchers-implementers/clinical-decision-support-cds
http://en.wikipedia.org/wiki/Clinical_decision_support_system