Retention

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Retention can have the following meanings:

  1. Instance of retaining (e.g. water in the ground; see retention pond or retention basin)
  2. In learning: the ability to retain facts and figures in memory (spaced repetition)
  3. In schools, keeping a student in the same grade for another year (that is, not promoting the student to the next higher grade with his/her classmates) (see Grade retention and social promotion)
  4. In usenet, the retention period is the time a news server holds a newsgroup posting before deleting it as no longer relevant. For practical reasons, most news servers have different categories for different classes of postings: for example, the "announce" newsgroup for the ISP or other agency providing the news server may retain postings either for a very long time or indefinitely, whereas postings in binary newsgroups are usually not retained for long due to the storage requirements involved.
  5. In the United States court system, judicial retention is a process whereby a judge is periodically subject to a vote in order to remain in the position of judge.
  6. In organizations, keeping personnel within the organization from departing.