“Information” and “appraisal” are nowadays more than ever essential concepts of human activity and life. In addition, today information is one of the most valuable and important resources for more and more organizations. The concept “information” (in English only in the singular) could be defined as a (representing answers to basic questions like why?, where?, when?, who?) organized in such a way, that its value is higher that the sum of the values of the respective facts. This concept should not be confused with other similar concepts such as “data” (relating to primary facts ) and “knowledge” (relating to answers that could be given to other essential questions like why? what for? and how?). Consequently, “information” can be defined as organized data, and “knowledge” as understood information.