Epsilon stations
- Deep space communications and reconnaissance stations
- Eleven outposts located in Beta Quadrant along Klingon border (DIS: "Magic to Make the Sanest Man Go Mad"; Star Trek: The Motion Picture)
- Epsilon 1 through Epsilon 11 (DIS: "Magic to Make the Sanest Man Go Mad")
- Epsilon 9 lost September 28, 2273; V'Ger incident (Star Trek: The Motion Picture)
- Epsilon 1 through Epsilon 11 (DIS: "Magic to Make the Sanest Man Go Mad")
- Other outposts located elsewhere near other major powers (SCE Short Story: "Interphase Book 1")
- Powers under observation by Epsilon stations include Tholian Assembly (SCE Short Story: "Interphase Book 1")