Personal log
A personal log, or daily log, was a type of log used to record a person's thoughts about a current mission, or record discrete entries arranged by date and reporting on activities over the course of a day, which could be recorded by name as an unofficial documentation of events as viewed from their professional position. It was similar to a diary, and was meant to be a personal record not available to others. (; ).

Personal logs made by members of Starfleet could be accessed by other officers during the course of an official investigation if authorized by a commanding officer, which Captain Jean-Luc Picard did for Deanna Troi and Worf while investigating the suicide of Lt. Daniel Kwan.  Reviewing the contents of Kwan's log, Troi found Kwan in the log didn't sound like someone planning to kill himself. ()  

In the 1990s, Shannon O'Donnel had the custom of keeping a personal oral diary with her tape recorder. ()

Positional personal logs

Individual personal logs  

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