Ubiquitous computing can be defined in terms referring to the Omnipresence. Omnipresence is the ability of an entity to be present in several places simultaneously. In this paper an analysis of Ubiquitous Computing and Omnipresence applied to information systems is performed. It starts with a review of bibliographic material concerning the subject up to the construction of a model in which the theory applies to real information systems. The general scheme presents the interaction of intelligent ubiquitous components within an environment of Omnipresentiality, allowing the acquisition of information through multiple forms, use, processing and generating autonomic responses in conducting high-level tasks.