For this cdrom, I tested/updated using accounts provided by Charles Sandman and Jerry Leslie (VAX with OpenVMS 6.1), as well as the DECUS server eisner.decus.org (Alpha with OpenVMS 7.2-1). For other system configurations, you'll need a C compiler (I've tested with DEC-C) and MMS (or its clone, MMK). The library builds with NETLIB and UCX. There are detailed build and install instructions in the sources (README.TXT). Thomas Dickey