The pronoun you is the second person personal pronoun both singular and plural and both nominative and oblique case in modern englishthe oblique objective form you functioned previously in the roles of both accusative and dative as well as all instances following a prepositionthe possessive forms of you are your used before a noun and yours used in place of a noun. Letter case or just case is the distinction between the letters that are in larger upper case also uppercase capital letters capitals caps large letters or more formally majuscule and smaller lower case also lowercase small letters or more formally minuscule in the written representation of certain languagesthe writing systems that distinguish between the upper and lower case.
informal letter format wikipedia