First order theory

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First, First aid, First to file and first to invent, First London, First Beeline, First Minister of Scotland, First baseman, First Minister and Deputy First Minister of Northern Ireland, First Boston, First West Yorkshire, First ladies of Nevada, First Worcester, FIRST Robotics Competition, First Act, First Student, First contact, First family, First woman, First degree, First Love, First aid kit, First Time, First Fruits, First impression, B2 First, First ladies of Pennsylvania, First ascent, First Light, First American, Who's on First?, First Nations, First lady, First person, Credit Suisse First Boston, First Fleet, First Line, First man or woman, First Horizon Bank, Kʼómoks First Nation, First Union, First Things First, First Cut, First of May, First Glasgow, Deputy First Minister of Scotland, Stoney Nakoda First Nation, Singaporeans First, FIRST Lego League Challenge, Ɂakisq̓nuk First Nation, First Things First (album), The First Noel, First National Pictures, FIRST Tech Challenge, First-order, First Artists, First Hampshire & Dorset, First-person narrative, List of first ladies of Minnesota, First-class cricket, First Ministers' conference, First ladies and gentlemen of Alaska, First ladies and gentlemen of North Carolina, First Minister of Wales, First-order logic, First Step, First Lady of the United States, First Nehru ministry, First-rate, First Lady of Ethiopia, First-person (video games), First Album, First responder, First ladies of Wisconsin, First Nations in Ontario, First Kiss, First Nations in Canada, First Presidency (LDS Church), First ladies and gentlemen of Guam, First Republic of Korea, First and Last, First South West, First Data, Breadth-first search, Dehcho First Nations, First grade, First Growth, First strike, First American Financial Corporation, First Lady of Venezuela, First Chicago Bank, First minister, First Merchants Corporation, First Scotland East, First-foot, Clovis First, For the First Time, First Lord of the Admiralty, First ladies and gentlemen of the Philippines, First day of issue, First West of England, First-hitting-time model, First ladies and gentlemen of Oklahoma, Be First, First principle, First Nations in Alberta, People-first language, Maxillary first premolar, RSS First Step, FirstGroup, First ladies and gentlemen of Mexico, FIRST Championship, First Hill, Seattle, First sergeant, First Lady of the Gambia, First Internet Bank, First Evil, Love at First Sight, First ladies of Hawaii, First ladies of Maryland, First pass effect, First lieutenant, First Blood, First-wave feminism, Wizard's First Rule, America First, Ceremonial first pitch, First Folio, First class, First Expired, First Out, The First 48, First World problem, First hand, Certified first responder, Mitaanjigamiing First Nation, Beneteau First 14, First Church, First Things First (talk show), First white child, First Second Books, Blast First, Sq'éwlets First Nation, First ladies of North Dakota, First ladies and gentlemen of Gabon, First-mover advantage, Sipekne'katik First Nation, First Lady of Brazil, First Sea Lord, First Presidency, First Twenty Years, The First, First Bus East of England