Activity may refer to: *

Action (philosophy) An action is an event that an agent performs for a purpose, that is guided by the person's intention Intentions are mental states in which the agent commits themselves to a course of action. Having the plan to visit the zoo tomorrow is an examp ...

, in general * Human activity:

human behavior Human behavior is the potential and expressed capacity ( mentally, physically, and socially) of human Humans (''Homo sapiens'') are the most abundant and widespread species In biology Biology is the natural science that st ...

, in sociology behavior may refer to all basic human actions, economics may study human economic activities and along with cybernetics and psychology may study their modulation *

Recreation Recreation is an activity of leisure Leisure has often been defined as a quality of experience or as free time. Free time is spent away from , , , , and , as well as necessary activities such as and ing. Leisure as an experience usuall ...

, or activities of leisure * The Aristotelian concept of

energeia In philosophy Philosophy (from , ) is the study of general and fundamental questions, such as those about existence Existence is the ability of an entity to interact with physical reality Reality is the sum or aggregate of all that ...

, Latinized as ''actus'' *

Activity (UML) An activity in Unified Modeling Language (UML) is a major task that must take place in order to fulfill an operation contract. ThStudent Guide to Object-Oriented Development
defines an activity as a sequence of activities that make up a process ...

, a major task in Unified Modeling Language * ''Activity'', the rate of catalytic activity, such as enzyme activity (

enzyme assay Enzyme assays are laboratory methods for measuring enzyme, enzymatic activity. They are vital for the study of enzyme kinetics and enzyme inhibitor, enzyme inhibition. Enzyme units The quantity or concentration of an enzyme can be expressed in Mol ...

), in physical chemistry and enzymology *

Thermodynamic activity In chemical thermodynamics, activity (symbol ) is a measure of the "effective concentration" of a chemical species, species in a mixture, in the sense that the species' chemical potential depends on the activity of a real solution in the same way t ...

, the effective concentration of a solute for the purposes of mass action *

Activity (project management) In project management, a task is an activity that needs to be accomplished within a defined period of time or by a Time limit, deadline to work towards work-related goals. It is a small essential piece of a job that serves as a means to differentia ...

Activity Activity may refer to: * Action (philosophy), in general * Human activity: human behavior, in sociology behavior may refer to all basic human actions, economics may study human economic activities and along with cybernetics and psychology may stud ...

, the number of radioactive decays per second *

Activity (software engineering) Activity may refer to: * Action (philosophy), in general * Human activity: human behavior, in sociology behavior may refer to all basic human actions, economics may study human economic activities and along with cybernetics and psychology may stud ...

Activity (soil mechanics) The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil: its shrinkage limit, plastic limit, and liquid limit. Depending on its water content, a soil may appear in one of four states: solid, semi-solid, plasti ...

* , an aircraft carrier of the Royal Navy * "Activity", a song by Way Out West from ''

Intensify ''Intensify'' is the second studio album by English electronic music duo Way Out West (duo), Way Out West, released on 20 August 2001 by Distinct'ive Records. The album was marked by a move from the defunct Deconstruction Records label to Distinct ...

'' *

, a board game by

Piatnik & Söhne Wiener Spielkartenfabrik Ferd. Piatnik & Söhne, commonly referred to as Piatnik, is an Austrian playing card A playing card is a piece of specially prepared card stock, heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, ...

See also