Retention

Retention may refer to:

General

 * Recall (memory), in learning, the ability to recall facts and figures in memory
 * Memory and retention in learning
 * Selective retention
 * Cultural retention
 * Customer retention
 * University student retention
 * Employee retention, the ability to keep employees within an organization
 * Forced retention
 * Grade retention, in schools, keeping a student in the same grade for another year (that is, not promoting the student to the next higher grade with their classmates)
 * Retention or retainage of an agreed portion of a contract price until project completion
 * Retention basin
 * Retention election, in the United States court system, a process whereby a judge is periodically subject to a vote in order to remain in the position of judge
 * Retention rate
 * Retention ratio, in company earnings
 * Retention of vision, in magic
 * Water retention (medicine), abnormal accumulation of fluid in the body
 * Urinary retention, the lack or inability to urinate
 * Variable retention, in land management and forestry conservation

Information and records

 * Retention (news server), in Usenet, the time a news server holds a newsgroup posting before deleting it as no longer relevant
 * Data retention, in law and computing
 * Data retention (telecommunication)
 * Retention period, of a document, in records management
 * Retention of title clause, in law

Chemistry

 * Retention agent, a process chemical
 * CO₂ retention
 * Retention of configuration, in chemical reactions
 * ER retention, proteins retained in the endoplasmic reticulum after folding
 * Retention factor

Maths

 * Retention distance
 * Retention uniformity