Moravek Endre: Index acronymorum selectorum. Pars 7. Instituta communicationis (A MTAK kiadványai 47. Budapest, 1966)

- 122 PdN Pressedienst der Nation, Bern /d/ PDT Panstwowa Dyrekcja Tramwajowa /ро/ P.E. Pacific Electric Railway Company, /US/ /е/ PEL Personnel Licensing /and Training/ Division /1СА0/ /е/ Pen.

R.R. Pennsylvania Railroad Company, /US/ /е/ PER Peoria and Eastern Railway Company, /US/ /е/ Persindo Persbureau Indonesia /пе/ PES Postal Express Service /е/ Peve Prensa Venezolana, Caracas /es/ P.

F.

A. 1. Presse Française Associée /f/ 2. Popular Flying Association, /GB/ /е/ 3. Postens Filateliavdelning /s/ PFB Provisional Frequency Board /ITU/ /е/ = CPF PFC Private Flying Corps, /US/ /е/ PFS 1. Passengers and Freight Service /е/ 2. planned flying and servicing /е/ PFT Pittsburgh, Fort Wayne and Chicago Railway, /US/ /е/ PFZ Post- und Fernmeldetechnisches Zentralamt /d/ PGA Professional Group on Audio Frequency, /US/ /е/ PGAC Professional Group on Automatic Control /IRE/ /е/ PGANE Professional Group on Aeronautical and Navigational Electronics /Inst, of Radio Engineers/, /US/ /е/ PGAP Professional Group on Antennas and Propagation /IRE/ /е/ PGBTR Professional Group on Broadcast and Television Receivers /Inst, of Radio Engineers/, /US/ /е/ PGBTS Professional Group on Broadcast Transmission Systems, /IRE/ /е/ PGCP Professional Group on Component Parts /IRE/ /е/ PGCS Professional Group on Communications Systems /Inst. of Radio Engineers/, /US/ /е/ PGCT Professional Group on Circuit Theory /Inst, of Radio Engineers/, /US/ /е/ P.

G.E. Pacific Great Eastern Railway Company, /US/ /е/ PGEC Professional Group on Electronic Computers /Inst, of Radio Engineers/, /US/ /е/