Retention may refer to:

General

Recall (memory) Recall in memory refers to the mental process of retrieval of information from the past. Along with encoding and storage, it is one of the three core processes of memory. There are three main types of recall: free recall, cued recall and serial ...

, in learning, the ability to recall facts and figures in memory * Memory and retention in learning *

Selective retention Selective retention, in relating to the mind, is the process whereby people more accurately remember messages that are closer to their interests, values and beliefs, than those that are in contrast with their values and beliefs, selecting what to ...

* Cultural retention *

Customer retention Customer retention refers to the ability of a company or product to retain its customers over some specified period. High customer retention means customers of the product or business tend to return to, continue to buy or in some other way not defe ...

University student retention University student retention, sometimes referred to as persistence, is a process to try to improve graduation rates and decrease a loss of tuition revenue via programs such via peer pressure, student academic programs, counselor and faculty monitor ...

Employee retention Employee retention is the ability of an organization to retain its employees and make sure the sustainability of employees. Employee retention can be represented by a simple statistic (for example, a retention rate of 80% usually indicates that an o ...

, the ability to keep employees within an organization *

Forced retention Forced retention refers to the act of applying pressure to employees to deter them from leaving a company. The most common way to do this is through legal means, such as non-compete and non-disclosure agreements. Given an adequately broad agreemen ...

Grade retention Grade retention or grade repetition is the process of a student repeating a grade due to failing on the previous year. An alternative to grade retention due to failure is a policy of social promotion, with the idea that staying within their sam ...

, 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) *

Retention basin A retention basin, sometimes called a wet pond, wet detention basin, or stormwater management pond (SWMP), is an artificial pond with vegetation around the perimeter and a permanent pool of water in its design. It is used to manage stormwater ...

, *

Retention election A judicial retention election (or retention referendum) is a periodic process in some jurisdictions whereby a judge is subject to a referendum held at the same time as a general election. The judge is removed from office if a majority of votes are ...

, 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 The term "retention rate" is used in a variety of fields, including marketing, investing, education, in the workplace and in clinical trials. Maintaining retention in each of these fields often results in a positive outcome for the overall organiza ...

Retention ratio Retention ratio indicates the percentage of a company's earnings that are not paid out in dividends but credited to retained earnings. It is the opposite of the dividend payout ratio The dividend payout ratio is the fraction of net income a firm ...

, in company earnings * Retention of vision, in magic *

Water retention (medicine) Edema, also spelled oedema, and also known as fluid retention, dropsy, hydropsy and swelling, is the build-up of fluid in the body's tissue. Most commonly, the legs or arms are affected. Symptoms may include skin which feels tight, the area ma ...

, abnormal accumulation of fluid in the body *

Urinary retention Urinary retention is an inability to completely empty the bladder. Onset can be sudden or gradual. When of sudden onset, symptoms include an inability to urinate and lower abdominal pain. When of gradual onset, symptoms may include loss of blad ...

, the lack or inability to urinate *

Variable retention Variable retention is a relatively new silvicultural system that retains forest structural elements for at least one rotation in order to preserve environmental values associated with structurally complex forests. Some examples for environmental va ...

, 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 Data retention defines the policies of persistent data and records management for meeting legal and business data archival requirements. Although sometimes interchangeable, it is not to be confused with the Data Protection Act 1998. The different ...

, in law and computing ** Data retention (telecommunication) *

Retention period A retention period (associated with a retention schedule or retention program) is an aspect of records and information management (RIM) and the records life cycle that identifies the duration of time for which the information should be maintained ...

, of a document, in records management * Retention of title clause, in law

Chemistry

* Retention agent, a process chemical * CO₂ retention *

Retention of configuration Walden inversion is the inversion of a stereogenic center in a chiral molecule in a chemical reaction. Since a molecule can form two enantiomers around a stereogenic center, the Walden inversion converts the configuration of the molecule from ...

, in chemical reactions *

ER retention ER retention refers to proteins that are retained in the endoplasmic reticulum, or ER, after folding; these are known as ER resident proteins. Protein localization to the ER often depends on certain sequences of amino acids located at the N termi ...

, proteins retained in the endoplasmic reticulum after folding *

Retention factor In chromatography, the retardation factor (''R'') is the fraction of an analyte in the mobile phase of a chromatographic system. In planar chromatography in particular, the retardation factor ''R''F is defined as the ratio of the distance traveled ...

Maths

Retention distance Retention distance, or ''RD'', is a concept in thin layer chromatography, designed for quantitative measurement of ''equal-spreading'' of the spots on the chromatographic plate and one of the Chromatographic response functions. It is calculated ...

Retention uniformity Retention uniformity, or ''RU'', is a concept in thin layer chromatography. It is designed for the quantitative measurement of ''equal-spreading'' of the spots on the chromatographic plate and is one of the Chromatographic response functions. Fo ...

General

Information and records

Chemistry

Maths

See also