the beginning of a sentence: There is no such business as show business.
the personal pronoun “I”: This is the place I like best.
“the” in proper names only if it’s an inseparable part of the specific name: I really like the Pogues, I’ve been to their concert in The Hague.
personal names and nicknames: Robin, Babe Ruth, Peter Piper, the Sultan of Swat, Stonewall Jackson, Joe “Nine Fingers” Jackson ...
kinship terms when they immediately precede a personal name, or when they are used alone in place of a personal name: I told Mom about Uncle Joe. Don’t capitalize “mom” and “dad” whenever they are used as generic terms: I told my mom about my uncle Joe.
proper names such as house names, roads, districts, towns, postcodes, countries, continents, oceans, rivers, lakes, deserts, mountains: Tom lived in a tiny room in Rosebud Cottage on the Isle of Man in the Irish Sea. Don’t capitalize city, town, county, etc. if it comes before the proper name: the county of Clare, Clare County, the city of New York, New York City, but: New York state ...
specific regions, but not points of the compass: the South (but: southern areas, or in the south of Malta), the Midwest ...
famous districts or neighborhoods: the South Side (of Chicago), the Upper West Side (of New York) ...
deities and personifications: God, Fame, the Eight Immortals ...
reverential pronouns (referring to God): Let us praise Him, for He hath created heaven and earth and all living beings. This practice, once common, has been abandoned by many non-Christian writers.
ethnic groups, nationalities and languages: In my experience, many Spaniards love the English language.
historical eras: The Middle Ages gave way to the Renaissance.
planets and other celestial bodies: Mars, Halley’s Comet ... . Don’t capitalize: the earth, the sun, the moon...
departments and institutions: the Department of Applied Sciences , the Ministry of the Interior, Stuttgart University,the German Red Cross, The Teachers’ Assembly ….
adjectives that are derived from proper names: Elizabethan, Dickensian, Kafkaesque ... . Don’t capitalize adjectives from proper names if they have already acquired a broader meaning: of gargantuan proportions (= extremely huge, from Rabelais’ novel), herculean (= of strong physical built, from the Greek hero Hercules), quixotic (= both heroic and ridiculous, from the hero of Cervantes’ classic novel Don Quixote), draconian (= very strict, from the Athenian lawgiver Draco) ...
titles: Mr, Mrs, Dr, Aunt, Uncle, Lord, Superintendent, Dad, Rev., M.P., Capt., President Obama, Doctor Johnson, but not for occupations: coach Ben Fury, 27-year-old athlete Germaine Williams, the last president of Uganda. Egalitarian writers refuse to capitalize the Queen (of England) or the Pope. In personal address, capitalize titles that show special respect: I really don’t know, Doctor. – Aye, Captain!
brand names starting with a small letter: EBay is major player in the field of online marketing.
days of the week: Monday, Tuesday, Wednesday, Sunday...
brand and product names: Mitsubishi, Coca-Cola, a Big Mac...
months of the year: January, February, December...
festivals: Easter, Christmas, Ramadan, Bank Holiday Monday, New Year’s Eve, Mothering Sunday, Passover, Thanksgiving...
each new line in a (traditional) poem: Rough winds do shake the darling buds of May, / And summer’s lease hath all too short a date: ...
some acronyms and abbreviations: NATO, WHO,WoW, Unesco (BE), UNESCO (AmE)....
titles, for all important words such as nouns, verbs, adverbs, adjectives, numerals: The Catcher in the Rye, To Kill a Mocking Bird...
the first word after the greeting in a letter: Dear Ruth, Your letter…
some recipes and food terms: Joe’s Walnut Crumble, a Pizza Margarita, Tabasco sauce ...
some plants, especially for those parts that contain family names or geographical names or refer to cultivars: a Golden Delicious apple, Douglas fir, a Jerusalem artichoke
some medical conditions named after people, Epstein-Barr syndrome, Parkinson's disease
the first letter in a closing phrase: Yours sincerely, Thomas.
the first letter of a quotation, a formal statement, or a complete sentence: This what most people dislike most: If writers don’t capitalize anything at all, or if they capitalize each and every word.- According to Shakespeare, “The pen is mightier than the sword.”
the first letter of a quote or parenthesis that consists of a full sentence: Such statements (All Germans are evil) lead to a bias in the media. – According to Johnson’s Brief Introduction to the World Molluscs, “Garden snails can usually be found in moist places.”
in legal documents, when the full name of an individual or company is later referred to in short form: Albert Horowitz (Plaintiff), Monsanto (the Company)...