Principal, Principal parts, Principal dancer, Vice-principal, Principal Financial Group, Principal bundle, Principal–agent problem, Principal (academia), Connection (principal bundle), Sheriff principal, Principal axis, Principal Clerk of Session and Justiciary, Principal of the University of Glasgow, The Principal and the Pauper, Principal component analysis, Principal meridian, Principal Skinner, Teatre Principal de Maó, Principal teacher, Victoria Principal, Principal Feast, Principal Holy Day (Anglicanism), Principal direction, The Principal Upanishads, Principal investigator, Principal curvature, The Principal, Fourth principal meridian, Principal Hotel Company, Principal naval transport officer (Royal Navy), Principal Galaxies Catalogue, List of Welsh principal areas, Fifth principal meridian, Cauchy principal value, Principal city, Sixth principal meridian, Principal Cordillera, Principal Secretary, Princess Principal: Crown Handler, Principal ideal ring, Principal areas of Wales

Principal (music), Principal Edwards Magic Theatre, Principal quantum number, Principal Secretary (Canada), Principal type, Principal secretary (India), Principal of the University of St Andrews, Principal area, Principal council, Third principal meridian, List of principals of Brasenose College, Oxford, Principal series, Second principal meridian, Principal Group, Principal Upanishads, Principal photography, Principal Register, First principal meridian, Principal trade, Principal component regression, Multilinear principal component analysis, Principal officials of Hong Kong, Vice Principals, List of principals of King's College London, Principal response curve, List of Principal Chiefs of the Cherokee, Principal Private Secretary to the Prime Minister of the United Kingdom, Principal (computer security), List of principal leaders of the Crusades, Principal Solicitor for Ireland, List of principals of Somerville College, Oxford, Krull's principal ideal theorem, John Lee (university principal), Wellcome Trust Principal Research Fellowship, Principal Stakes, Teatro Principal de València, Principal ideal domain, Principal series representation, Principal Charity Classic, Principal protected note, Principal warfare officer, Principal form of a polynomial, List of First and Principal Naval Aides-de-Camp, List of species and habitats of principal importance in England, Principal Staff Officer (Bangladesh), Principal sensory nucleus of trigeminal nerve, Principal gerbil, Principal orbit type theorem, Principal interacting orbital, Principal variation search

Principal, Principal parts, Principal dancer, Vice-principal, Principal Financial Group, Principal bundle, Principal–agent problem, Principal (academia), Connection (principal bundle), Sheriff principal, Principal axis, Principal Clerk of Session and Justiciary, Principal of the University of Glasgow, The Principal and the Pauper, Principal component analysis, Principal meridian, Principal Skinner, Teatre Principal de Maó, Principal teacher, Victoria Principal, Principal Feast, Principal Holy Day (Anglicanism), Principal direction, The Principal Upanishads, Principal investigator, Principal curvature, The Principal, Fourth principal meridian, Principal Hotel Company, Principal naval transport officer (Royal Navy), Principal Galaxies Catalogue, List of Welsh principal areas, Fifth principal meridian, Cauchy principal value, Principal city, Sixth principal meridian, Principal Cordillera, Principal Secretary, Princess Principal: Crown Handler, Principal ideal ring, Principal areas of Wales, Principal (music), Principal Edwards Magic Theatre, Principal quantum number, Principal Secretary (Canada), Principal type, Principal secretary (India), Principal of the University of St Andrews, Principal area, Principal council, Third principal meridian, List of principals of Brasenose College, Oxford, Principal series, Second principal meridian, Principal Group, Principal Upanishads, Principal photography, Principal Register, First principal meridian, Principal trade, Principal component regression, Multilinear principal component analysis, Principal officials of Hong Kong, Vice Principals, List of principals of King's College London, Principal response curve, List of Principal Chiefs of the Cherokee, Principal Private Secretary to the Prime Minister of the United Kingdom, Principal (computer security), List of principal leaders of the Crusades, Principal Solicitor for Ireland, List of principals of Somerville College, Oxford, Krull's principal ideal theorem, John Lee (university principal), Wellcome Trust Principal Research Fellowship, Principal Stakes, Teatro Principal de València, Principal ideal domain, Principal series representation, Principal Charity Classic, Principal protected note, Principal warfare officer, Principal form of a polynomial, List of First and Principal Naval Aides-de-Camp, List of species and habitats of principal importance in England, Principal Staff Officer (Bangladesh), Principal sensory nucleus of trigeminal nerve, Principal gerbil, Principal orbit type theorem, Principal interacting orbital, Principal variation search, General Securities Principal Exam, Uniform Principal and Income Act, List of principals and fellows of Jesus College, Oxford, List of Phillips Exeter Academy principals, The Principal (Vice Principals), Principal Richard Pound, National Association of Secondary School Principals, List of principals of Hertford College, Oxford, Principal Triangulation of Great Britain, Ascending chain condition on principal ideals, Uniform Fiduciary Income and Principal Act, Principal Private Secretary to the Secretary of State for Foreign and Commonwealth Affairs, The Principal's Office, Principal (commercial law), List of principals of the University of Edinburgh, Principal curvature-based region detector, Principal value, Partially disclosed principal, North and East of First Principal Meridian, Go and Ask Peggy for the Principal Thing, Structure theorem for finitely generated modules over a principal ideal domain, Head teacher, Principal Olivil, Ribeira Principal, Principal, Ecuador, Principal branch, Papel Principal, Engin Principal du Génie, Principal Place, Principal ideal, Principal Tower, Principal (Catholic Church), List of Principals of Elizabeth College, Guernsey, List of principals of Lady Margaret Hall, Oxford, L1-norm principal component analysis, Robert Howie (principal), Leader of the Green Party of England and Wales, Principal Charming, Ape Principal, Ten principal disciples, Alameda Principal, Multiple principal problem, Principal boy, Principal of the University of Aberdeen, Principal balance, Principal Park, Princess Principal, Principal Painter in Ordinary, Principal part, El Principal Airport, Principal Theatre (Pontevedra), Undisclosed principal, Principal point, Principal stratification, Matthew Smyth (principal), Robert Boyd (university principal), Principales, Principal series (spectroscopy), List of principals of Green Templeton College, Oxford, Principal (criminal law)