Despite the Romans' common use of lead pipes, their aqueducts rarely poisoned people. Unlike other parts of the world where lead pipes cause poisoning, the Roman water had so much calcium in it, that a layer of plaque prevented the water contacting the lead itself.
OMB definition, Office of Management and Budget: the division of the Executive Office of the President that prepares and administers the federal budget and improves management in the executive branch. See more.
1) What is the role and importance of the Office of Management and Budget? The OMB prepares the annual budget statement for the president, reviews the budget and programs of the president, supplies economic forecasts, and conducts analysis on proposed bills and agency rules.