Personal effects, personal property, or possessions were objects or items of property belonging to, acquired by, or controlled by a person.
In 2364, Captain Jean-Luc Picard noted that a lot had changed in the past three-hundred years, Humanity had eliminated the need for possessions. (TNG: "The Neutral Zone")
In 2368, Jean-Luc Picard asked William T. Riker if he would like to write a letter to Carmen Davila's family, to be included with the personal effects Starfleet would be returning to them after her death. Riker answered in the affirmative. (TNG: "Silicon Avatar")
In 2376, in an effort to make Lyndsay Ballard's return to USS Voyager easier, Tom Paris and Neelix removed her personal effects from storage. (VOY: "Ashes to Ashes")