Eunice was a Unix-like working environment for VAX computers running DEC's VAX/VMS, based on the BSD version of Unix.
1981 by David Kashtan at SRI,[1] and later maintained and marketed by The Wollongong Group.
It provided VMS binary versions of Unix tools, a VMS object library emulating the Unix API (including the system call interface) and an assembler that produced VMS binaries.
[3] Eunice was criticized for its performance problems and not quite complete Unix compatibility.
[1] Eunice's reputation for poor compatibility inspired the "Congratulations.