This paper is unavailable as a self archived post print. Sheng-Uei Guan and Kai Wang, “Hierarchical Incremental Class Learning with Output Parallelism”, 167-193, Vol. 16, No. 2, Journal of Intelligent Systems, 2007. (B) If you wish to obtain a copy of this article please visit http://people.brunel.ac.uk/~hssrjis/ or email one of the authors for a personal copy: Steven.Guan@brunel.ac.uk Brunel University Research Archive (BURA) http://bura.brunel.ac.uk