This paper presents an overview of some open research problems in the representation of emotion on computers. The issues discussed arise in the context of a broad, albeit shallow, emotion reasoning platform based originally on the ideas of Ortony, Clore, and Collins(Ortony, Clore, and Collins 1988). In addressing these problems we hope to (1) correct and expand our content theory of emotion, and pseudo personality, which underlies all aspects of the research; (2) answer feasibility questions regarding a usable representation of the emotion domain in the computer, and (3) build agents capable of emotional interaction with users. A brief description of a semantics-based AI program, the Aflectiue Reasoner, and its recent multi-media extensions is given. Issues pertaining to affective user modeling, an expert system on emotion eliciting situations, the building of a sympathetic computer, models of relationship, personality in games, and the motivation behind the study of emotion on computers are discussed. References to the current literature and recent workshops are made.