What does Pb stand for?

Lead

Phenobarbital (STED)

Plumbum - Lead - Chemical element

Presbyopia - Ophthalmology

Probability

Probenecid (STED)

Air Burundi - ICAO designator (AD)

Bachelor of Philosophy (WDAA)

Barometric Pressure - Medicine (STED)

Bethlehem Public Library, Bethlehem, PA - Library symbol - Library of Congress (LCLS)

Dr. Karl Thomae GmbH - Germany - Research code symbol

Lead - BTS (TAG)

Pacific Beach (SAUS)

Pacific Brigade

Packard Bell (SAUS)

Paderborn - German license plate city code

Page Buffer (NITA)

Painted Base (AAG)

Panama Basin

Panamco - NYSE symbol

Panamerican Beverages - NYSE symbol (SPSG)

Panamerican Beverages `A' - NYSE symbol

Panic Bar - Technical drawings

Paperback (CDAI)

Paper Base (MSA)

Paperboard Industries Corp. - Toronto Stock Exchange symbol

Papua Besena - Papua New Guinea - Political party (FEA)

Parabellum (GOBB)

Paraffin Bath - Medicine

Parallel Binary (ACAE)

Paris Bourse - The French stock exchange

Parity BIT - Binary Digit - Data communications (IAA)

Parke-Bernet - Later, SPB - Manhattan art auction house

Parliamentary Bill - British (ROG)

Parole Board - Australian Capital Territory

Particle Beam

Particle-Beam Weapon

Parts Breakdown

Passband (SAUS)

Passbook - Banking

Passed Ball

Patch Bay (SAUS)

Patrol Base - Army (VNW)

Patrol Boat - Navy symbol

Patrol Bomber

Paul-Bunnell - Test - Immunology (AAMN)

Pawnbroker

Pay Board

Peaceful Beginnings (EA)

Peach Bottom (SAUS)

Peanut Butter - Brand name of the Red Wing Co.

Pending Bid (TIMI)

Pennsylvania Ballet

Pentaborane - Rocket fuel

Pentobarbital - Organic chemistry

Peribrachialis - Anatomy

Period Breathing - Therapy term (CTAA)

Peripheral Blood - Medicine (AAMN)

Peripheral Buffer

Permanent Ballast (DS)

Permanent Base (SAUS)

Permanent Bunkers

Permanently Blind

Permian Basis (SAUS)

Peroneus Brevis - Muscle - orthopedics (DAVI)

Personnel Board (SAUS)

Petabyte (SAUS)

Petrus Brito - Flourished, 13th century - Authority cited in pre-1607 legal work (DSA)

Phalangeal Bracket - i.e., cup handle - Slang

Pharmacopoeia Britannica - British Pharmacopoeia

Phase Boundary (SAUS)

Phenobarbital - A drug

Philosophiae Baccalaureus - Bachelor of Philosophy

Phonetically Balanced - With reference to word lists

Phosphate Buffer

Phosphoribosyl

Photon Barrier - Astrophysics

Physics Briefs - Physikalische Berichte - American Institute of Physics - Database - Information service or system (IID)

Physiotherapists Board - Australian Capital Territory

Picket Boat - Navy

Piebald

Piggyback (IAA)

Pilot Balloon (SAUS)

Pilotless Bomber - Air Force

Pinchbeck - Jewelry (ROG)

Pinch Biopsy - Medicine (MEDA)

Pine Bark

Pink Bollworm - Cotton pest

Pipe Break - Nuclear energy (NRCH)

Pipeline Burst (SAUS)

Piperonyl Butoxide - Organic chemistry

Pistol, Bolt-action - NCIC gun type code (NCIC)

Pit Border - Paleobotany

Pitney-Bowes, Inc.

Planning Board

Plasma reactor, Barrel type (SAUS)

Plasminogen Binding - Hematology

Plastic Banded (SAUS)

Plate Block - Philately

Playback (KSC)

Plot Board (KSC)

Plotboard (SAUS)

Plotting Board (SAUS)

Plugboard

Plugged Back (SAUS)

Plugging Back - Computer science (IAA)

Plymouth Brethren (ROG)

Pocket Book

Police Band (SAUS)

Police Boat (SAUS)

Police Burgh

Policy Board (OICC)

Polished Buckram (DGA)

Pollen Body - Botany

Polybenzene - Organic chemistry

Polybutadiene (SAUS)

Polybutylene - Organic chemistry

Polymer Blend (SAUS)

Polymyxin B - An antibiotic

Polystyrene Base (DGA)

Pony Baseball (EA)

Pony Baseball/Softball - An association (EA)

Poop and Bridge - of a ship (DS)

Poor Box

Population Biology

Portable (SAUS)

Ports and Beaches (NATG)

Post Bag (SAUS)

Post Boost (ACAE)

Powder Bed (DAVI)

Powder Board (DAVI)

Power Boiler

Power Box (IAA)

Power Brakes - Automotive engineering

Power Builder - Computer software (CDE)

Prayer Book

Pre-Boreal (SAUS)

Preburner - NASA (NASA)

Precipitation Body (SAUS)

Preliminary Breakdown

Premature Beat - Medicine (CPH)

Premium Bond (ODBW)

Presentation Brothers - See also FPM (EAIO)

President's Budget - Military technology (DDF)

Presiding Bishop - Episcopal Church

Pressure-Barometer - Automotive emissions

Pressure Breathing

Primary Buffer - Chemistry

Primary Bus - Computer science (CAAL)

Primitive Baptist

Printed Board (AAEL)

Prisoners' Barracks (ADA)

Private Bus (SAUS)

Private Business - Slang - British

Privately Bonded

Probable - Telegraphy (PCTE)

Process Basic (ECII)

Process Bulletin

Procurement Board (SAUS)

Product Baseline (SAUS)

Product Bulletin (SAUS)

Production Base (MCD)

Professional Books Ltd. (ILCA)

Profile Block (MCD)

Program Base - Computer science (ELAL)

Program Baseline (DOMA)

Program Block (IAA)

Program Breakdown

Program Budgeting (ADA)

Programming Block (SAUS)

Property Book - Army (AABC)

Proportional Band

Protein-Binding (MAE)

Protein-Bound - Clinical chemistry (DAVI)

Provisional Battalion - Military - A publication (ROG)

Pseudo Boolean (SAUS)

Pseudoterminal Bud - Botany

Ptychodiscus brevis - An alga, the cause of the red tide

Public (DSUE)

Publication Bulletin (SAUS)

Publications (NITA)

Publications Board - Later, CFSTI, NTIS

Publications Bulletin

Public Buildings (SAUS)

Publisher (NITA)

Publishers' Binding (DGA)

Publisher's Name - Online database field identifier

Puebla - NCIC Mexican state code (NCIC)

Pull Back (NTCM)

Pull Box (AAG)

Pulse Beacon (KSC)

Pulse Bonded (SAUS)

Punch Buffer (SAUS)

Punching Block (SAUS)

Pure Binary (SAUS)

Purl into Back of Stitch - Knitting (WDAA)

Purplish Blue

Push Button