PHIGS

PHIGS: Programmer Hierarchical Interactive Graphics System
PIM: Personal Information Manager
PIN: 1) Parcel Identification Number, 2) Personal Identification Number ...

PHIGS (Programmer's Hierarchical Interactive Graphics System) is very similar to GKS-3D. It is also a three dimensional computer graphics standard.

See also: Interface, Microcomputer, International Standards Organization, Information, Hierarchical