What do a.m. and p.m. stand for?

operations research

the analysis, usually involving mathematical treatment, of a process, problem, or operation to determine its purpose and effectiveness and to gain maximum efficiency.
Origin of operations research
1940-45, Americanism Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for operations research
  • Those include geography, linguistics, and operations research.
  • Relief and humanitarian aid is fertile and almost unbroken ground for operations research.
  • The other majors ranged from chemistry, molecular biology and mathematics to operations research, religion and psychology.
British Dictionary definitions for operations research

operations research

the analysis of problems in business and industry involving the construction of models and the application of linear programming, critical path analysis, and other quantitative techniques Also operational research
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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