$ ASSIGN SYS$SYSDEVICE:[E787.UMC.V2] UMC$DIR
Users at other sites sites should check with the person in charge of the local version of UMC for the correct assignment.
EGS$DIR
EGS$DIR points to the directory containing the EGS4 object library. On
PUPHEP this is SYS$SYSDEVICE:[MARLOW.EGS4]. At other sites EGS$DIR, if
it is used at all, should be the same as UMC$DIR.
IF$DIR
IF$DIR points to the directory containing EGS4 include files. On PUPHEP
this is SYS$SYSDEVICE:[MARLOW.EGS4.TIF]. Users at other sites should check
with the person in charge of their local version for the correct assignment.