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 ...

. 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 radiatio ...

. 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, e ...

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 animal coverings, such as the arthropod exoskeleton, have different ...

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 g ...

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 fi ...

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 s ...

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 floo ...

measures such as physical firewalls and

fireproofing Fireproofing is rendering something ( structures, materials, etc.) resistant to fire, or incombustible; or material for use in making anything fire-proof. It is a passive fire protection measure. "Fireproof" or "fireproofing" can be used as a ...

, and

active fire protection Active fire protection (AFP) is an integral part of fire protection. AFP is characterized by items and/or systems, which require a certain amount of motion and response in order to work, contrary to passive fire protection. Categories of active fi ...

measures, such as

fire sprinkler A fire sprinkler or sprinkler head is the component of a fire sprinkler system that discharges water when the effects of a fire have been detected, such as when a predetermined temperature has been exceeded. Fire sprinklers are extensively use ...

systems. *

Waterproofing Waterproofing is the process of making an object or structure waterproof or water-resistant so that it remains relatively unaffected by water or resisting the ingress of water under specified conditions. Such items may be used in wet environme ...

, though application of surface layers that repel water. * Rot-proofing and

rustproofing Rustproofing is the prevention or delay of rusting of iron and steel objects, or the permanent protection against corrosion. Typically, the protection is achieved by a process of surface finishing or treatment. Depending on mechanical wear or e ...

* 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 Radiation protection, also known as radiological protection, is defined by the International Atomic Energy Agency (IAEA) as "The protection of people from harmful effects of exposure to ionizing radiation, and the means for achieving this". Expos ...

, protection of people and the environment from radiation * Dust resistance

Protection of persons

Close protection A bodyguard (or close protection officer/operative) is a type of security guard, government law enforcement officer, or servicemember who protects a person or a group of people — usually witnesses, high-ranking public officials or officers, ...

, physical protection and security from danger of very important persons *

Climbing protection Climbing protection is any of a variety of devices employed to reduce risk and protect others while climbing rock and ice. It includes such items as nylon webbing and metal nuts, cams, bolts, and pitons. Different forms of climbing draw on ...

, safety measures in climbing *

Diplomatic protection In international law, diplomatic protection (or diplomatic espousal) is a means for a state to take diplomatic and other action against another state on behalf of its national whose rights and interests have been injured by that state. Diplomatic ...

Humanitarian protection Humanitarian protection is the act of promoting and ensuring the legal rights of people affected by humanitarian crises. The concept of humanitarian protection was established by the 1949 Geneva Conventions and responsibility to ensure protectio ...

, the protection of civilians, in conflict zones and other humanitarian crises *

Journalism source protection Source protection, sometimes also referred to as source confidentiality or in the U.S. as the reporter's privilege, is a right accorded to journalists under the laws of many countries, as well as under international law. It prohibits authorities, i ...

Personal protective equipment Personal protective equipment (PPE) is protective clothing, helmets, goggles, or other garments or equipment designed to protect the wearer's body from injury or infection. The hazards addressed by protective equipment include physical, ...

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 ...

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

condom A condom is a sheath-shaped Barrier contraception, barrier device used during sexual intercourse to reduce the probability of pregnancy or a Sexually transmitted disease, sexually transmitted infection (STI). There are both male and female con ...

s * Executive protection, security measures taken to ensure the safety of important persons *

Protection racket A protection racket is a type of racket and a scheme of organized crime perpetrated by a potentially hazardous organized crime group that generally guarantees protection outside the sanction of the law to another entity or individual from viol ...

, a criminal scheme involving exchanging money from "protection" against violence *

Right of asylum The right of asylum (sometimes called right of political asylum; ) is an ancient juridical concept, under which people persecuted by their own rulers might be protected by another sovereign authority, like a second country or another ent ...

, 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 Padlocks are portable locks with a shackle that may be passed through an opening (such as a chain link, or hasp staple) to prevent use, theft, vandalism or harm. Naming and etymology The term '' padlock'' is from the late fifteenth century. ...

icon An icon () is a religious work of art, most commonly a painting, in the cultures of the Eastern Orthodox, Oriental Orthodox, and Catholic churches. They are not simply artworks; "an icon is a sacred image used in religious devotion". The most ...

, 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 Computer science is the study of computation, automation, and information. Computer science spans theoretical disciplines (such as algorithms, theory of computation, information theory, and automation) to practical disciplines (including ...

the

separation of protection and security In computer sciences, the separation of protection and security is a design choice. Wulf et al. identified protection as a mechanism and security as a policy,Wulf 74 pp.337-345 therefore making the protection-security distinction a particular cas ...

is a

design A design is a plan or specification for the construction of an object or system or for the implementation of an activity or process or the result of that plan or specification in the form of a prototype, product, or process. The verb ''to design' ...

choice.

William Wulf William Allan Wulf (born December 8, 1939) is a computer scientist notable for his work in programming languages and compilers. Until June 2012, he was a university professor and the AT&T Professor of Engineering and Applied Sciences in the Depart ...

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 ...

and security as a

policy Policy is a deliberate system of guidelines to guide decisions and achieve rational outcomes. A policy is a statement of intent and is implemented as a procedure or protocol. Policies are generally adopted by a governance body within an orga ...

. *

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 Object-oriented programming (OOP) is a programming paradigm based on the concept of "objects", which can contain data and code. The data is in the form of fields (often known as attributes or ''properties''), and the code is in the form of ...

Protection of ecological systems

Environmental protection Environmental protection is the practice of protecting the natural environment by individuals, organizations and governments. Its objectives are to conserve natural resources and the existing natural environment and, where possible, to repair dam ...

, the practice of protecting the natural environment

Protection of social systems

* Consumer protection, laws governing sales and credit practices involving the public. *

Protectionism Protectionism, sometimes referred to as trade protectionism, is the economic policy of restricting imports from other countries through methods such as tariffs on imported goods, import quotas, and a variety of other government regulatio ...

, an economic policy of protecting a country's market from competitors. *

Protection of 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 of ...

, with respect to civil and political rights. *Data protection through

information privacy Information privacy is the relationship between the collection and dissemination of data, technology, the public expectation of privacy, contextual information norms, and the legal and political issues surrounding them. It is also known as data ...

measures. *

Intellectual property protection Intellectual property (IP) is a category of property that includes intangible creations of the human intellect. There are many types of intellectual property, and some countries recognize more than others. The best-known types are patents, co ...

References

{{wiktionary, protection, protect Safety