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.
So, OMB reviews agency spending plans during the summer, sending a passback (i.e., proposed changes) to agencies in the fall. A final consolidated budget is then sent to Congress by late winter. The budget side is the largest part of OMB. The management side issues directives for federal agencies to comply with in the managament of information technology projects, financial statements, etc.