First order theory

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First, First aid, First to file and first to invent, First Minister and Deputy First Minister of Northern Ireland, First Beeline, First London, First Minister of Scotland, First baseman, First Boston, First West Yorkshire, FIRST Robotics Competition, First Worcester, First Student, First contact, First Act, Stoney Nakoda First Nation, First family, First lady, First aid kit, First Love, First woman, First degree, First Time, B2 First, First impression, First Fruits, First ladies of Pennsylvania, First Light, Who's on First?, First American, First Nations, Credit Suisse First Boston, First Fleet, First Line, First man or woman, First person, First ascent, First ladies of Nevada, First Union, First of May, The First Noel, First Horizon Bank, First Cut, Kʼómoks First Nation, FIRST Tech Challenge, First Things First (album), First-order logic, Deputy First Minister of Scotland, First National Pictures, Singaporeans First, Ɂakisq̓nuk First Nation, FIRST Lego League Challenge, First Hampshire & Dorset, List of first ladies of Minnesota, First Things First, First Lady of the United States, First Glasgow, First-class cricket, First-person narrative, First Ministers' conference, First Minister of Wales, First Kiss, First ladies and gentlemen of Alaska, First responder, First Artists, First-rate, First Nehru ministry, First ladies and gentlemen of North Carolina, First-order, First Step, First-person (video games), First Nations in Ontario, First Lady of Ethiopia, First 100 days of the first Trump presidency, First ladies and gentlemen of Arkansas, First South West, First ladies and gentlemen of Guam, First and Last, First principle, First Presidency (LDS Church), First Album, First ladies of Wisconsin, First strike, First Republic of Korea, First grade, First Merchants Corporation, First American Financial Corporation, Dehcho First Nations, First ladies and gentlemen of the Philippines, Breadth-first search, First Lady of Venezuela, First minister, First-foot, First Lord of the Admiralty, First Bus East of England, First Chicago Bank, First ladies and gentlemen of Oklahoma, First-wave feminism, Be First, First Scotland East, First Nations in Canada, First Growth, First Data, First-hitting-time model, First Dates, Clovis First, First day of issue, For the First Time, First ladies of Florida, First ladies and gentlemen of Mexico, First Expired, First Out, FirstGroup, FIRST Championship, First ladies of Maryland, RSS First Step, The First 48, First Lady of the Gambia, First West of England, First Blood, First white child, First Evil, First Internet Bank, First sergeant, First pass effect, First Hill, Seattle, First World problem, Mitaanjigamiing First Nation, First lieutenant, First Folio, Love at First Sight, Certified first responder, Wizard's First Rule, First period, Ceremonial first pitch, First Church, First-mover advantage, Maxillary first premolar, First Things First (talk show), First Second Books, First Sea Lord, First class, Sq'éwlets First Nation, First ladies of North Dakota, First hand, Nanoose First Nation, First Lady of Brazil, Sipekne'katik First Nation, The First, Sofia the First, First Aliyah, First Nations in Alberta