Ontologies are being used in various disciplines to model domain knowledge. With the technological advances, new concepts can emerge in a domain and old ideas get obsolete from the domain. The underlying ontologies that model the real world domain also need modifications over time to reflect the changes to the corresponding domain. Currently one of the most critical problems that are being faced is the history management of changes to ontologies also termed as ontology evolution. Many researchers have addressed this problem and proposed different approaches and frameworks but still a critical aspect of this problem i.e., maintenance of historical record of the changes, is still to be tackled. In this paper the authors model this critical aspect of ontology evolution using TOS (Temporal Object System) based HMS (History Management System). The proposed HMS system not only helps to maintain the ontology evolution over time but also updates and maintains the changes to ontology evolution over time but also updates and maintains the changes to ontology in a uniform manner. The authors also present TOWL (Temporal Ontology Web Language), a query language, to support HMS in retrieving temporal information.