What does PROB stand for?

Problem

This definition appears very rarely and is found in the following Acronym Finder categories:

Other Resources:

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Professional Resources for Officers' Assistance in Civil Trial (Los Angeles Police Department training program) Programme for Advanced Contactless technology (radio security teaching program, Graz, Austria) Programa de Oferta Agropecuaria (Spanish) Principal Office for Asia and the Pacific (UNESCO) Principal Regional Office for Asia and the Pacific (UNESCO) CAD-Based Programming System for Arc Welding Robots in One-Off-Production Runs Programa Regional Ambiental para Centro América (Guatemala) Peer Review Oversight Board (accounting; Missouri and Texas) People's Republic of Bangladesh Probable/Probably		Project for On-Board Autonomy (technology demonstration missions of the European Space Agency) Probability of Detection Pilot Radiation Observation Experiment (Atmospheric Radiation Measurement Climate Research Facility; US Department of Energy) Preternatural Research Bureau (Doctor Who spinoff series) Program Optimization & Budget Evaluation Project Review and Objective Evaluation (health records; UK) Prose Reading Observation Evaluation (New Zealand) Prospective, Randomized, Open, Blinded End-Point (clinical trial design) Provincial Broadband Extension (New Zealand) Proxy Based Estimating (software development)