Starfleet gives non-commissioned authority to different rates of specialist, such as "specialist first class", "specialist second class" and "specialist third class". Some specific type of specialists also exist in Starfleet, and were referred to be their own titles, including: chef, electrician, nurse, sensor analyst, technician and yeoman. (TOS - Star Trek II Short Stories short story: "The Blaze of Glory")
The term "specialist" could also be applied as a title for a higher ranked person who has been appointed as a specialist in their position.
- Non-commissioned specialists
- Specialist officers