Partial and semipartial geometries: an update Original Research Article

The Handbook of Incidence Geometry (Handbook of Incidence Geometry, Buildings and Foundations, North-Holland, Amsterdam, 1995) appeared in 1995. In Chapter 12, On some rank two geometries, an almost complete overview was given on the status of the theory on partial and semipartial geometries. Now, 5 years later, it is maybe a good time to give an update of this status. Indeed a lot of things have happened during these years. Moreover we take the opportunity to give complete parameter lists of all known examples of partial and semipartial geometries known so far.