Tony Duell wrote: and It is an "International Student Edition". Some publishing companies offer these paperback editions in poorer countries where people couldn't possibly afford the hard back edition. Some are even translated to other languages (even mandarin). carlos. Carlos E. Murillo-Sanchez email: carlos_murillo at ieee.org Dean of Engineering, Universidad Autonoma de Manizales, Manizales, Colombia ---- "Western civilization... thought like the greek, organized itself like the romans and believed in itself like the hebrew." -- Ortega y Gasset.