What does Ppd stand for?

Prepaid (MIST)

Postpaid (WDMC)

Prepaid (WDMC)

Prepared (MAE)

Purified Protein Derivative (AD)

A Posteriori Probability Distribution - Mathematics

Doctrinaire Panamenistra Party - Political party (PSAP)

Drexel University, Philadelphia, PA - Library symbol - Library of Congress (LCLS)

Humacao-Palmas - Puerto Rico - Airport symbol (OAG)

I-GOOS Panel on Products and Distribution (SAUS)

Packs per Day - Cigarettes - Medicine

Panel Power Distribution (MCD)

Panoramic Passive Detection (SAUS)

Papered (ROG)

Paranoid Personality Disorder (AD)

Para-Phenylenediamine - Organic chemistry

Partial Packet Discard (MLOA)

Partido Popular Democratico - Popular Democratic Party of Puerto Rico - Spanish (BARN)

Partido por la Democracia - Democratic Party - Chile - Political party (EY)

Parti Populaire Djiboutien - Djibouti People's Party - Political party (PPW)

Parti Progressiste Dahomeen - Dahomey Progressive Party - Political party

Parts Provisioning Document

Party for Peace and Democracy - South Korea - Political party

Payload Position Data

Pay Packets Deficency (SAUS)

Pay Packets Deficiency - British

Pepsin Pancreatin Digest - Food protein digestibility assay

Peripheral Pulse Distributor (SAUS)

Permanent Partial Disability - Dentistry (MAE)

Personal Protective Device - Toxicology

Personnel Planning Data - Navy

Personnel Priority Designator - Military (AFM)

Petroleum Production Division (AD)

Pharmaceutical Product Development, Inc. (EFIS)

Phenyldiphenyloxadiazole - Organic chemistry (MAE)

Piperidine Pentamethylene Dithiocarbonate (SAUS)

Pitch Phase Detector

Plains Petroleum Co. - Vancouver Stock Exchange symbol

Planning Productian Data (SAUS)

Plot Plan Drawing (SAA)

Point Position Data

Politieke Partij Democraten 66 - Political Party Democrats 66 - Netherlands (EAIO)

Portland Public Docks (AD)

Port Protection Device - Computer science (ITCA)

Portuguese Popular Democrats

Posterior Polymorphous Dystrophy - Neurology (DAVI)

Postpaid

Postpartum Day - Obstetrics (DAVI)

Postpartum Depression (PAZ)

Postponed - Telegraphy (PCTE)

PostScript Printer Description - Computer science

Pour Point Depressant - Fuels and lubricants

Pour Point Differential - Petroleum engineering

Preferred Policyholders' Discount - British (BARN)

Premiere Performance Division - Automotive industry

Prepaid

Prepaid Dental Plan - Insurance (MCD)

Pre-Paid Legal Services, Inc. - AMEX symbol (SPSG)

Pre-Paid Legal Svcs - AMEX symbol

Preprototype Demonstration

Presidential Protective Division - US Secret Service

Prime Power Distribution

Principal Project Designer - Engineering project management

Printer Page Description - Computer science

Processed Payment Document (GFGA)

Product and Process Description (SAUS)

Production Program, Douglas

Proficiency Pay Designator - Military (AABC)

Prognostic Prediction Devices

Program for Persons with Disabilities - National Science Foundation (RCD)

Program Package Document

Program Planning Directives - NASA (KSC)

Program Planning Document (NG)

Progressive Perceptive Deafness - Medicine

Projectile Pull and Drain - Machine (MCD)

Project Planning Directive (NG)

Project Planning Document (ABAC)

Prompt Payment Discount (AAGC)

Propria Pecunia Dedicavit - With His Own Money He Offered It - Latin (ROG)

Propulsion and Power Division - Manned Spacecraft Center - NASA

Provisioning Procurement Data

Proximity, Point Detonating (SAUS)

Pulse-Type Phase Detector

Purchasing Power of the Dollar (MHDW)

Purified Protein Derivative - Tuberculin

Purified Protein Derivature - A lung disease