TERMINOLOGY OF UFOs

The frequently used term "Close Encounters" was coined by the late Dr. J. Alan Hynek as part of a terminology designed to categorize different types of UFO experiences. There are six main categories:

1. Nocturnal lights
   

2. Daylight discs
   

3. Radar/visual
   

4. CE-I (Close Encounter of the First Kind) to denote a close observation.
   

5. CE-II (Close Encounter of the Second Kind) to denote cases where physical evidence is left by the UFO, i.e. ground traces, electromagnetic effects on motors, physiological effects.
   

6. CE-III (Close Encounter of the Third Kind) to denote cases where occupants are reported in addition to the object.

Researchers have recently expanded this terminology to include CE-IV for alleged abductions.

UFO BRIEFING DOC - TABLE OF CONTENTS