Abbreviating the Titles of Doctors: For medical doctors, write either Dr.Placing a Period at the End of an Abbreviation: In American usage, an abbreviation that includes the first and last letters of a single word (Doctor, for example) is usually followed by a period (Dr.), while In British usage, the period (or full stop) is usually omitted (Dr).Use 'an' before a vowel sound ('an ABC documentary' or 'an MRI'). Use 'a' before a consonant sound (for example, 'a CBC documentary' or 'a U.S. Using Indefinite Articles Before Abbreviations, Acronyms, and Initialisms: The choice between 'a' and 'an' is determined by the sound of the first letter in the abbreviation.Today’s Gregorian calendar keeps the Julian names – including the now-incorrect numbered names for September, October, November and December.10 Tips for Using Abbreviations Correctly After his death, the months July (Julius) and August (Augustus) were added to the calendar. Julius Caesar revised the calendar to the Julian calendar, which modified the month lengths according to the Earth’s revolutions around the sun. December comes from the Latin decem (“ten).November comes from the Latin novem (“nine”).October comes from the Latin octo, meaning the eighth month of the year.September comes from septem, the seventh month of the 10-month year.June was named after the goddess of marriage, Juno.May was named after the goddess Maia, the earth goddess.April comes from the Latin aperio (“to open” in plants or buds).March was named after Mars, god of war, during a period of military campaigns.February comes from the Latin februa (“to cleanse or clean”) and the purification festival of Februalia.January was named after Janus, god of gates and openings.

Roman months were named after gods and goddesses and Latin words. It has changed from its original form as the ancient Roman lunar calendar, which had 10 named months and 2 unnamed months during the winter. The modern calendar is known as the Gregorian calendar.

Letter abbreviations for words