 These names were mainly fixed in form many years before grammatical rules were fully standardised.While Newcastle United play football at a stadium called St James' Park, and Exeter City at St James Park, London has a St James's Park (this whole area of London is named after the parish of St James's Church, Piccadilly).Modern usage has been influenced by considerations of technological convenience including the economy of typewriter ribbons and films, and similar computer character "disallowance" which tend to ignore past standards.