| Word | Description |
| PASSCAL | Program for Array Seismic Studies of the Continental Lithosphere. The PASSCAL facility provides the seismological community with state-of-the-art, low-power, portable seismic instrumentation in support of investigator-driven seismological experiments worldwide. |
| PDCC | Portable Data Collection Centers (PDCC) software provides network operators a portable software facility for managing seismic network data and metadata. |
