Retention

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

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