HP Model 712/100 - Workstation Technical Reference Manual page 14

HP–UX
Operating system:
Languages
User Interface and Graphics Libraries
HP–UX Operating Systems and Languages
HP–UX 9.03 or later.
HP–UX complies with the UNIX
Definition X/Open and POSIX Specifications and will be
fully compliant with Operating Systems Foundation (OSF)
C/ANSI C
FORTRAN 9000
Pascal
HP C++
C++ Developer
HP GKS
X11R5
Motif 1.2
VUE 3.0
Architect 2.0
System V Interface