Open Descendants at c = 1
  The algebraic construction of open descendants is reviewed and extended. The procedure is applied to c=1 models. Chiral data for the case of extended free boson orbifolds is presented, in the form of fusing and brading matrices for the untwisted sector. For this sector the pentagon and hexagon identities are checked. Some chiral data concerning the mixed and twisted sectors is also presented. 
N. Sousa