They're not like us

• Some say they live among us
• Roswell, N.M. visitors?
• Subjects for special fx artists
• French links?
• Many "Star Trek" characters, briefly
• UFO sightings
• "The War of the Worlds" foes, e.g
• A.P. exam org.
• SAT corp

Wikipedia Word definitions in Wikipedia
ETS is an abbreviation of: