From the very beginning, this group comprised members from various disciplines like Mathematics, Computer Science and Philosophy, and provided appropriate ambience for interdisciplinary exchange of opinions and views. Though initially it was a study group, it gradually developed into a research group. Some of the areas in which research work has been done, or is being pursued by members, are Rough Set Theory, Fuzzy Logic, Paraconsistent Logic and Set Theory, Vagueness and Approximate Reasoning, Modal Logic, Non-monotonic Reasoning, Belief Change, Linear Logic, and Logic of Diagrams.