What does PFB stand for?

Parallel Filter Bank (CIST)

Partei Freier Buerger - Free Citizens' Party - Germany - Political party (PPW)

Passo Fundo - Brazil - Airport symbol (OAG)

Patellofemoral Knee Brace - Medicine

Payload Feedback - NASA (MCD)

Payload Forward Bus - NASA (MCD)

Pentafluorobenzyl - Organic radical

Pentafluorobenzyl Bromide - Organic chemistry

Photo Flash Battery

Plasti-Fab Ltd. - Toronto Stock Exchange symbol

Pneumatic Float Bridge

Popular Front in Bahrain - Political party (PSAP)

Position Feedback (MCD)

Postscript Font Binary (SAUS)

Prefabricated - Technical drawings

Prefetch Buffer (CIST)

Preformed Beams - SONAR

Pressure Fed Booster (NASA)

Pressurized Fluid-Bed - Chemical engineering

Printer Font Binary - Computer science (CDE)

Provincial Food Bureau (SAUS)

Provisional Frequency Board - ITU

Pseudofollicutitis Barbae - Medicine