Omega
Astronomical nomenclature
 Omega IV, a planet
 Omega IV native, either the Yangs or the Kohms
 Omega IV virus
 Omega Centus I, a planet
 Omega Cygni, a star
 Omega Leonis, a star
 Omega Leonis sector block
 Omega Sagitta system, a star system
 Omega sector, a star sector
 Omega system, a star system

Computer files
 "137/Omega", a communications file aboard Baran's mercenary vessel
 "EMH Program AK-1 Diagnostic and Surgical Subroutine Omega 323"
 "Omega one", a file pertaining to the Omega molecule

Maneuvers
 "Attack pattern Omega", used by Benjamin Sisko against the Klingons; used by Sisko against the Centaur; used by Kathryn Janeway against the Krenim
 "Attack pattern Omega-4", used by Sisko against the Jem'Hadar
 "Auto-destruct sequence Omega", used by Jean-Luc Picard
 "Defense procedure omega", used by Janeway
 "Evasive pattern Omega", used by Sisko to evade the Jem'Hadar; used by Chakotay to evade the Vetar
 "Evasive pattern Omega-1", used by Chakotay to evade the Kazon
 "Evasive pattern Omega-2", used by Janeway to evade the Kazon
 "Evasive pattern Omega-3", used by Janeway to evade the Kazon
 "Evasive pattern Omega-6", used by Tom Paris to evade the Praylor
 Omega Directive, a Starfleet general order
 Omega training mission
 Star Fleet Battle Group Omega

Miscellaneous nomenclature
 "47-Omega, section 9", a module aboard a Borg cube
 Omega Cluster, a Starfleet award
 Omega constant, a math term
 Omega molecule
 Omega radiation
 Omega radiation therapy
 Omega series, a group of elements on the periodic table

Personnel codes
 "ECH-Omega-42", used to eject the warp core
 "Janeway-Omega-3"
 "Leyton-1-Omega-47"
 "Omega-327", a personal log security clearance system used by Picard
 "Omega-47", engineering override code used by Hogan and Neelix
 "Riker-Omega-3"
 "Seven of Nine-Omega-Phi-93", used to eject the warp core 
 "Sisko-Omega-17", used to end auto-destruct
 "Torres-Omega-Phi-93", used to eject the warp core
 "Troi-Omega-Omega-31"

Production references
 Omega Cygni system

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