[1] Premises Distribution System (AT&T) - Ethernet Verteilungssystem

[2] Professional Development System - Microsoft BASIC Entwicklungssystem

[3] Physical Delivery Service

[4] Public Domain Software

[5] Program Data Source (->"IEEE Standard Dictionary")

[6] Planetary Data System (NASA, http://stardust.jpl.nasa.gov/)

[7] Packet Driver Specification

[8] Portable Document Software

[9] Package Data System (->"NASA Acronym List")

[10] Partitioned Data Set (->"NASA Acronym List")

[11] Power Distribution System (->"NASA Acronym List")

[12] Problem Data System (->"NASA Acronym List")

[13] Piedras Negras, Mexico - internationale Fughafen-Kennung