Controller may refer to:

Occupations

* Controller or financial controller, or in government accounting

comptroller A comptroller (pronounced either the same as ''controller'' or as ) is a management-level position responsible for supervising the quality of accounting and financial reporting of an organization. A financial comptroller is a senior-level executi ...

, a senior accounting position * Controller, someone who performs

agent handling In intelligence organizations, agent handling is the management of so-called agents (called secret agents or spies in common parlance), principal agents, and agent networks (called "assets") by intelligence officers typically known as case o ...

in espionage * Air traffic controller, a person who directs aircraft

Computing and electronics

Model–view–controller Model–view–controller (MVC) is a software architectural pattern commonly used for developing user interfaces that divide the related program logic into three interconnected elements. This is done to separate internal representations of infor ...

, an architectural pattern used in software engineering * Controller (computing) (disambiguation) *

Microcontroller A microcontroller (MCU for ''microcontroller unit'', often also MC, UC, or μC) is a small computer on a single VLSI integrated circuit (IC) chip. A microcontroller contains one or more CPUs (processor cores) along with memory and programmable i ...

, a small computer on a single integrated circuit * Game controller, an input device used for playing video games

Control engineering

* Control theory, control of continuously operating dynamical systems in engineered processes and machines **

Irrigation controller An irrigation controller is a device to operate automatic irrigation systems such as lawn sprinklers and drip irrigation systems. Most controllers have a means of setting the frequency of irrigation, the start time, and the duration of watering. ...

, a device to automate irrigation systems ** PID controller, a control loop feedback mechanism * Control loop, contains all the control elements for controlling a process variable **

Anti-lock brake controller An anti-lock braking system (ABS) is a automobile safety, safety anti-Skid (automobile), skid Brake, braking system used on aircraft and on land motor vehicle, vehicles, such as cars, motorcycles, trucks, and buses. ABS operates by preventing t ...

, in an anti-lock braking system * Industrial control system, a general term used in industrial process control * Proportional control, a type of linear feedback control system

Biomedical

Elite controllers Long-term nonprogressors (LTNPs), sometimes also called elite controllers, are individuals infected with HIV, who maintain a CD4 count greater than 500 without antiretroviral therapy with a detectable viral load. Many of these patients have been ...

, individuals who do not develop AIDS after exposure to HIV

Fiction

* Controller (comics), multiple characters ** Controller (Marvel Comics), a fictional character in Marvel Comics ** Controllers (DC Comics), a fictional extraterrestrial race in the DC Universe * The Fat Controller (Sir Topham Hatt), the head of the railway in ''The Railway Series'' of books written by the Reverend W.V. Awdry, also The Thin Controller and The Small Controller on other railway lines in those books * Controller, a being controlled by a Yeerk in the '' Animorphs'' series by K.A. Applegate * ''The Controller'', an AI system in the '' Armored Core 3'' video game

Music