This volume contains the papers presented at the International Conference on Object Oriented Information Systems - OOIS '94. Containing contributions from leading researchers and practitioners working on object technology and its application in information systems design and development, OOIS'94 has a strong practical focus and contains much technical insight of particular relevance to professionals working in the field. Two main themes are covered - object oriented modelling concepts and object oriented databases and their applications - and topics covered include modelling, knowledgebases, software development, interface design, object databases, distributed databases and emerging object technologies.