[1] Page Description Language (z.B. PostScript, SGML, HTML)

[2] Program Design/Description Language

[3] Push Down List

[4] PERL Data Language

[5] Pocket Dosimeter, Low (->"NASA Acronym List")

[6] Procedure Distribution List (->"NASA Acronym List")

[7] Ponta Delgada, Azores - internationale Fughafen-Kennung