Δδ Delta is a letter in the Greek language alphabet of Earth, originating in the early period of Human history.

It was used in the following contexts:

Cartography

• Delta Quadrant

Colonies

• Delta Rana IV colony

Measurements

• Grid Delta-17, a grid number on a computer display in 2370
• Net delta-vee, a type of measurement on a starship, such as the SS Mariposa or Charybdis

Medical and science terminology

• delta-compressed wavelengths were used by VISORs
  • the VISOR also used delta-band emissions
• delta radiation
  • delta-wave inducer
• delta-series radioisotope
• delta sleep
• medical database four-delta-one

Planets

• Beth Delta I
• Canine Delta V
• Delta IV
• Delta Charnock IX
• Delta Rana IV
• Delta Theta III
• Delta Vega
• Delta Vega (Vulcan system)
• Memory Delta

Ships

• Delta Flyer
• Delta Flyer escape pod
• Delta Flyer II
• NX-Delta

Space stations

• Science Station Delta 05

Spatial regions

• Delta Triangle
• Omicron Delta region

Species

• Deltans

Star systems

• Delta system
• Delta Orionis system
• Delta Rana system

Starfleet terminology

• delta shift, the fourth duty shift on a Starfleet vessel
• Kira Delta 547, Major Kira Nerys's security code in 2372
• pattern delta, delta sequence, and pattern delta five were Starfleet evasive maneuvers
• pattern delta was also a Starfleet standard maneuver
• Picard Delta One, a holodeck program

Stars

• Delta Orionis

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