Is Time a Real Time? An Overview of Time Ontology in Informatics

Aim of this paper is to introduce several aspects of time in the heteroge- neous world of Informatics and define ontologies for time in different domains of computers and their applications and not to discuss the very nature of time by itself a philosophical problem which is to remain open forever.However, we are going to give some philosophical and physical background because from the richness of often contrasting ideas developed in the framework of these disciplines many useful concepts have been derived; we shall leave the reader to confront himself against them following his personal belief. Then we deal with processors and networks architectural aspects and with information systems applications.