When used in text, use the complete word. Saint in geographical names, but not Fort or Mount. Number before figures. Lower-case abbreviations usually take periods, particularly when the abbreviations form words. Upper-case abbreviations and acronyms usually do not take periods.
Major exceptions are academic degrees.
Cents, percent, or degrees of temperature Names of countries, provinces, disctricts when they follow the names of towns Feet and inches, except in technical copy that contains many references to these measurements. Then, use ft. Names of states, except when they are pairs with names of cities in copy where space is limited, as in class notes in alumni publications. Use the two-letter Post Office abbreviations . Street, Avenue, Boulevard, Road, Place, etc.