This is GNU bc 1.04. The full distribution of GNU bc-1.04 may be found at any GNU software archive. The master copy is at ftp://prep.ai.mit.edu/pub/gnu/bc-1.04.tar.gz. Not everything included in the full bc-1.04 distribution is included. The files included here are only the needed files for building bc on NetBSD. Their location in the NetBSD tree are different than in the original bc-1.04 source tree.