Safety instructions at a construction site in China

Protection is any measure taken to guard a thing against

damage Damage is any change in a thing, often a physical object, that degrades it away from its initial state. It can broadly be defined as "changes introduced into a system that adversely affect its current or future performance".Farrar, C.R., Sohn, H., ...

caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like

civil and political rights Civil and political rights are a class of rights that protect individuals' freedom from infringement by governments, social organizations, and private individuals. They ensure one's entitlement to participate in the civil and political life o ...

. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as

ultraviolet light Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), shorter than that of visible light, but longer than X-rays. UV radiation i ...

. Biological membranes such as

bark Bark may refer to: * Bark (botany), an outer layer of a woody plant such as a tree or stick * Bark (sound), a vocalization of some animals (which is commonly the dog) Places * Bark, Germany * Bark, Warmian-Masurian Voivodeship, Poland Arts, ...

on trees and

skin Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other cuticle, animal coverings, such as the arthropod exoskeleton, have diffe ...

on animals offer protection from various threats, with skin playing a key role in protecting organisms against

pathogen In biology, a pathogen ( el, πάθος, "suffering", "passion" and , "producer of") in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ ...

s and excessive water loss. Additional structures like

scales Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number w ...

and

hair Hair is a protein filament that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and f ...

offer further protection from the elements and from predators, with some animals having features such as spines or camouflage serving exclusively as

anti-predator adaptation Anti-predator adaptations are mechanisms developed through evolution that assist prey organisms in their constant struggle against predators. Throughout the animal kingdom, adaptations have evolved for every stage of this struggle, namely by avo ...

s. Many animals supplement the protection afforded by their physiology by

burrowing An Eastern chipmunk at the entrance of its burrow A burrow is a hole or tunnel excavated into the ground by an animal to construct a space suitable for habitation or temporary refuge, or as a byproduct of locomotion. Burrows provide a form of sh ...

or otherwise adopting habitats or behaviors that insulate them from potential sources of harm. Humans originally began wearing clothing and building shelters in prehistoric times for protection from the elements. Both humans and animals are also often concerned with the protection of others, with adult animals being particularly inclined to seek to protect their young from elements of nature and from predators. In the human sphere of activity, the concept of protection has been extended to nonliving objects, including technological systems such as computers, and to intangible things such as intellectual property, beliefs, and economic systems. Humans seek to protect locations of historical and cultural significance through

historic preservation Historic preservation (US), built heritage preservation or built heritage conservation (UK), is an endeavor that seeks to preserve, conserve and protect buildings, objects, landscapes or other artifacts of historical significance. It is a philos ...

efforts, and are also concerned with protecting the environment from damage caused by human activity, and with protecting the Earth as a whole from potentially harmful objects from space.

Physical protection

Protection of objects

Fire protection Fire protection is the study and practice of mitigating the unwanted effects of potentially destructive fires. It involves the study of the behaviour, compartmentalisation, suppression and investigation of fire and its related emergencies, as we ...

, including

passive fire protection Passive fire protection (PFP) is components or systems of a building or structure that slows or impedes the spread of the effects of fire or smoke without system activation, and usually without movement. Examples of passive systems include floor- ...

measures such as physical firewalls and fireproofing, and active fire protection measures, such as fire sprinkler systems. * Waterproofing, though application of surface layers that repel water. * Rot-proofing and rustproofing * Thermal conductivity resistance *

Impact resistance In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing.Radiation protection, protection of people and the environment from radiation * Dust resistance

Protection of persons

* Close protection, physical protection and security from danger of very important persons * Climbing protection, safety measures in climbing * Diplomatic protection * Humanitarian protection, the protection of civilians, in conflict zones and other humanitarian crises * Journalism source protection * Personal protective equipment *

Safe sex Safe sex is sexual activity using methods or contraceptive devices (such as condoms) to reduce the risk of transmitting or acquiring sexually transmitted infections (STIs), especially HIV. "Safe sex" is also sometimes referred to as safer se ...

practices to afford sexual protection against pregnancy and disease, particularly the use of

condom A condom is a sheath-shaped barrier device used during sexual intercourse to reduce the probability of pregnancy or a sexually transmitted infection (STI). There are both male and female condoms. With proper use—and use at every act of in ...

s *

Executive protection Executive protection (EP), also known as close protection, refers to security and risk mitigation measures taken to ensure the safety of VIPs or other individuals who may be exposed to elevated personal risk because of their employment, high-profi ...

, security measures taken to ensure the safety of important persons * Protection racket, a criminal scheme involving exchanging money from "protection" against violence * Right of asylum, protection for those seeking asylum from persecution by political groups and to ensure safe passage * Workplace or employment retaliation, protecting individuals in the workplace such as from being fired for opposing, aiding and complaining about workplace practices

Protection of systems

Protection of technological systems

Protection of technological systems is often symbolized by the use of a padlock icon, such as "🔒", or a padlock image. *

Protection mechanism Protection is any measure taken to guard a thing against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although th ...

, in computer science. In computer sciences the separation of protection and security is a design choice. William Wulf has identified protection as a

mechanism Mechanism may refer to: *Mechanism (engineering), rigid bodies connected by joints in order to accomplish a desired force and/or motion transmission *Mechanism (biology), explaining how a feature is created *Mechanism (philosophy), a theory that a ...

and security as a policy. *

Power-system protection Power system protection is a branch of electrical power engineering that deals with the protection of electrical power systems from faults through the disconnection of faulted parts from the rest of the electrical network. The objective of a prot ...

, in power engineering *A way of encapsulation in object-oriented programming

Protection of ecological systems

* Environmental protection, the practice of protecting the natural environment

Protection of social systems

Consumer protection Consumer protection is the practice of safeguarding buyers of goods and services, and the public, against unfair practices in the marketplace. Consumer protection measures are often established by law. Such laws are intended to prevent business ...

, laws governing sales and credit practices involving the public. * Protectionism, an economic policy of protecting a country's market from competitors. * Protection of rights, with respect to civil and political rights. *Data protection through information privacy measures. * Intellectual property protection.

References

{{wiktionary, protection, protect Safety