Mister was a moderately formal title used in addressing an individual, most typically a male. Abbreviated as "Mr." and combined with the individual's surname, it was usually used socially and implied either respect or a lack of an established social relationship (as when first meeting someone).

One such example of the term used alone to address an individual was by Captain James T. Kirk in 2266 on board the USS Enterprise. During a conference with several crew members, Lieutenant Stiles became heated in protest to the lack of action being taken in pursuit of a Romulan Bird-of-Prey. After allowing Stiles to speak freely, Kirk calmly replied, "Sit down, mister." (TOS: "Balance of Terror")

The President of the Federation was properly addressed as "Mister President." (Star Trek IV: The Voyage Home)

Neelix often referred to Tuvok as "Mister Vulcan," a result of a misunderstanding during their first meeting. (VOY: "Caretaker")

After his marriage to Deanna Troi, William T. Riker was referred to jokingly as "Mister Troi." (Star Trek Nemesis)

The term "mister" was properly used to a variety of civilian individuals, such as:

Starfleet misters Edit

In Starfleet, adhering to old Earth naval tradition, it was also used sometimes in lieu of a more formal rank. This was generally done only when a superior officer addressed a subordinate, but it could also be used by subordinate-ranked individuals with superior officers when there was an established social relationship as well. (TOS: "The Cage")

In line with the tradition, and formalized by Starfleet protocol, the moniker was also utilized in Starfleet by senior officers to address female subordinate officers, as was the case with Lieutenant Saavik. (Star Trek II: The Wrath of Khan) Not all Starfleet female officers were enamored with the naval tradition of using original male monikers for females as well, as Ensign Harry Kim discovered when he introduced himself to his new captain, Kathryn Janeway, using the correct moniker "sir" – the formal companion moniker of "mister", used when addressing a superior officer. Janeway made it clear that she preferred being addressed by rank, "Ensign, despite Starfleet protocol, I don't like being addressed as sir. (...) Ma'am is acceptable in a crunch, but I prefer Captain." (VOY: "Caretaker")

Women in Starfleet referred to as "mister", included:

A Starfleet captain was not generally referred to as "mister." Jean-Luc Picard did not mind being mistakenly called "Mister Picard" by Professor Richard Galen in 2368. (TNG: "The Chase") Captain Will Decker was referred to as "Mister Decker" after being temporarily reduced in rank to commander in the 2270s. (Star Trek: The Motion Picture)

Other notable misters Edit

The following were seen to be called "mister," usually on numerous or notable occasions.

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