User`s guide

Glossary
370 Quantum Scalar i40 and Scalar i80 User’s Guide
WWPN (World Wide Port Name) The WWPN is a 64-bit, hard-coded
address for each port on an FC-connected device. It is used to
identify available SAN devices at end points.
X X-axis, X-position The horizontal position of the library’s robotic arm.
Y Y-axis, Y-position The vertical position of the library’s robotic arm.