Common Abbreviations

The series:
 * TOS: Star Trek: The Original Series
 * TAS: Star Trek: The Animated Series
 * TNG: Star Trek: The Next Generation
 * DS9: Deep Space Nine
 * VOY: Star Trek: Voyager
 * ENT: Star Trek: Enterprise
 * DIS (or Disco): Star Trek: Discovery (sometimes called STD, especially by those who do not like it)

The Films (I'm making these up as I go. Someone more knowledgeable than me, please step in and correct me):
 * TMP: Star Trek: The Motion Picture
 * WoK: Star Trek II: The Wrath of Khan
 * SoS: Star Trek III: The Search for Spock
 * TVH: Star Trek IV: The Voyage Home
 * TFF: Star Trek V: The Final Frontier
 * UC: Star Trek VI: The Undiscovered Country
 * STG: Star Trek Generations
 * FC: Star Trek: First Contact
 * STI: Star Trek: Insurrection
 * STN: Star Trek: Nemesis
 * ST9: Star Trek (2009 Lens Flare Edition)
 * SID: Star Trek: Into Darkness
 * STB: Star Trek Beyond