ACM Code of Ethics and Professional Conduct
Preamble
Computing professionals' actions change the world. To act responsibly, they should reflect upon
the wider impacts of their work, consistently supporting the public good. The ACM Code of
Ethics and Professional Conduct (“the Code”) expresses the conscience of the profession.
The Code is designed to inspire and guide the ethical conduct of all computing professionals,
including current and aspiring practitioners, instructors, students, influencers, and anyone who
uses computing technology in an impactful way. Additionally, the Code serves as a basis for
remediation when violations occur. The Code includes principles formulated as statements of
responsibility, based on the understanding that the public good is always the primary
consideration. Each principle is supplemented by guidelines, which provide explanations to
assist computing professionals in understanding and applying the principle.
Section 1 outlines fundamental ethical principles that form the basis for the remainder of the
Code. Section 2 addresses additional, more specific considerations of professional
responsibility. Section 3 guides individuals who have a leadership role, whether in the workplace
or in a volunteer professional capacity. Commitment to ethical conduct is required of every ACM
member, and principles involving compliance with the Code are given in Section 4.
The Code as a whole is concerned with how fundamental ethical principles apply to a computing
professional's conduct. The Code is not an algorithm for solving ethical problems; rather it
serves as a basis for ethical decision-making. When thinking through a particular issue, a
computing professional may find that multiple principles should be taken into account, and that
different principles will have different relevance to the issue. Questions related to these kinds of
issues can best be answered by thoughtful consideration of the fundamental ethical principles,
understanding that the public good is the paramount consideration. The entire computing
profession benefits when the ethical decision-making process is accountable to and transparent
to all stakeholders. Open discussions about ethical issues promote this accountability and
transparency.
1. GENERAL ETHICAL PRINCIPLES.
A computing professional should…
1.1 Contribute to society and to human well-being, acknowledging that all people are stakeholders in computing.
This principle, which concerns the quality of life of all people, affirms an obligation of computing
professionals, both individually and collectively, to use their skills for the benefit of society, its
members, and the environment surrounding them. This obligation includes promoting
fundamental human rights and protecting each individual's right to autonomy. An essential aim
of computing professionals is to minimize negative consequences of computing, including
threats to health, safety, personal security, and privacy. When the interests of multiple groups
conflict, the needs of those less advantaged should be given increased attention and priority.
Computing professionals should consider whether the results of their efforts will respect
diversity, will be used in socially responsible ways, will meet social needs, and will be broadly
accessible. They are encouraged to actively contribute to society by engaging in pro bono or
volunteer work that benefits the public good.
In addition to a safe social environment, human well-being requires a safe natural environment.
Therefore, computing professionals should promote environmental sustainability both locally
and globally.
1.2 Avoid harm.
In this document, “harm” means negative consequences, especially when those consequences
are significant and unjust. Examples of harm include unjustified physical or mental injury,
unjustified destruction or disclosure of information, and unjustified damage to property,
reputation, and the environment. This list is not exhaustive.
Well-intended actions, including those that accomplish assigned duties, may lead to harm.
When that harm is unintended, those responsible are obliged to undo or mitigate the harm as
much as possible. Avoiding harm begins with careful consideration of potential impacts on all
those affected by decisions. When harm is an intentional part of the system, those responsible
are obligated to ensure that the harm is ethically justified. In either case, ensure that all harm is
minimized.
To minimize the possibility of indirectly or unintentionally harming others, computing
professionals should follow generally accepted best practices unless there is a compelling
ethical reason to do otherwise. Additionally, the consequences of data aggregation and
emergent properties of systems should be carefully analyzed. Those involved with pervasive or
infrastructure systems should also consider Principle 3.7.
A computing professional has an additional obligation to report any signs of system risks that
might result in harm. If leaders do not act to curtail or mitigate such risks, it may be necessary to
“blow the whistle” to reduce potential harm. However, capricious or misguided reporting of risks
can itself be harmful. Before reporting risks, a computing professional should carefully assess
relevant aspects of the situation.
1.3 Be honest and trustworthy.
Honesty is an essential component of trustworthiness. A computing professional should be
transparent and provide full disclosure of all pertinent system capabilities, limitations, and
potential problems to the appropriate parties. Making deliberately false or misleading claims,
fabricating or falsifying data, offering or accepting bribes, and other dishonest conduct are
violations of the Code.
Computing professionals should be honest about their qualifications, and about any limitations
in their competence to complete a task. Computing professionals should be forthright about any
circumstances that might lead to either real or perceived conflicts of interest or otherwise tend to
undermine the independence of their judgment. Furthermore, commitments should be honored.
Computing professionals should not misrepresent an organization's policies or procedures, and
should not speak on behalf of an organization unless authorized to do so.
1.4 Be fair and take action not to discriminate.
The values of equality, tolerance, respect for others, and justice govern this principle. Fairness
requires that even careful decision processes provide some avenue for redress of grievances.
Computing professionals should foster fair participation of all people, including those of
underrepresented groups. Prejudicial discrimination on the basis of age, color, disability,
ethnicity, family status, gender identity, labor union membership, military status, nationality,
race, religion or belief, sex, sexual orientation, or any other inappropriate factor is an explicit
violation of the Code. Harassment, including sexual harassment, bullying, and other abuses of
power and authority, is a form of discrimination that, amongst other harms, limits fair access to
the virtual and physical spaces where such harassment takes place.
The use of information and technology may cause new, or enhance existing, inequities.
Technologies and practices should be as inclusive and accessible as possible and computing
professionals should take action to avoid creating systems or technologies that disenfranchise
or oppress people. Failure to design for inclusiveness and accessibility may constitute unfair
discrimination.
1.5 Respect the work required to produce new ideas, inventions, creative works, and computing artifacts.
Developing new ideas, inventions, creative works, and computing artifacts creates value for
society, and those who expend this effort should expect to gain value from their work.
Computing professionals should therefore credit the creators of ideas, inventions, work, and
artifacts, and respect copyrights, patents, trade secrets, license agreements, and other methods
of protecting authors' works.
Both custom and the law recognize that some exceptions to a creator's control of a work are
necessary for the public good. Computing professionals should not unduly oppose reasonable
uses of their intellectual works. Efforts to help others by contributing time and energy to projects
that help society illustrate a positive aspect of this principle. Such efforts include free and open
source software and work put into the public domain. Computing professionals should not claim
private ownership of work that they or others have shared as public resources.
1.6 Respect privacy.
The responsibility of respecting privacy applies to computing professionals in a particularly
profound way. Technology enables the collection, monitoring, and exchange of personal
information quickly, inexpensively, and often without the knowledge of the people affected.
Therefore, a computing professional should become conversant in the various definitions and
forms of privacy and should understand the rights and responsibilities associated with the
collection and use of personal information.
Computing professionals should only use personal information for legitimate ends and without
violating the rights of individuals and groups. This requires taking precautions to prevent re-
identification of anonymized data or unauthorized data collection, ensuring the accuracy of data,
understanding the provenance of the data, and protecting it from unauthorized access and
accidental disclosure. Computing professionals should establish transparent policies and
procedures that allow individuals to understand what data is being collected and how it is being
used, to give informed consent for automatic data collection, and to review, obtain, correct
inaccuracies in, and delete their personal data.
Only the minimum amount of personal information necessary should be collected in a system.
The retention and disposal periods for that information should be clearly defined, enforced, and
communicated to data subjects. Personal information gathered for a specific purpose should not
be used for other purposes without the person's consent. Merged data collections can
compromise privacy features present in the original collections. Therefore, computing
professionals should take special care for privacy when merging data collections.
1.7 Honor confidentiality.
Computing professionals are often entrusted with confidential information such as trade secrets,
client data, nonpublic business strategies, financial information, research data, pre-publication
scholarly articles, and patent applications. Computing professionals should protect
confidentiality except in cases where it is evidence of the violation of law, of organizational
regulations, or of the Code. In these cases, the nature or contents of that information should not
be disclosed except to appropriate authorities. A computing professional should consider
thoughtfully whether such disclosures are consistent with the Code.
2. PROFESSIONAL RESPONSIBILITIES.
A computing professional should…
2.1 Strive to achieve high quality in both the processes and products of professional work.
Computing professionals should insist on and support high quality work from themselves and
from colleagues. The dignity of employers, employees, colleagues, clients, users, and anyone
else affected either directly or indirectly by the work should be respected throughout the
process. Computing professionals should respect the right of those involved to transparent
communication about the project. Professionals should be cognizant of any serious negative
consequences affecting any stakeholder that may result from poor quality work and should
resist inducements to neglect this responsibility.
2.2 Maintain high standards of professional competence, conduct, and ethical practice.
High quality computing depends on individuals and teams who take personal and group
responsibility for acquiring and maintaining professional competence. Professional competence
starts with technical knowledge and with awareness of the social context in which their work
may be deployed. Professional competence also requires skill in communication, in reflective
analysis, and in recognizing and navigating ethical challenges. Upgrading skills should be an
ongoing process and might include independent study, attending conferences or seminars, and
other informal or formal education. Professional organizations and employers should encourage
and facilitate these activities.
2.3 Know and respect existing rules pertaining to professional work.
“Rules” here include local, regional, national, and international laws and regulations, as well as
any policies and procedures of the organizations to which the professional belongs. Computing
professionals must abide by these rules unless there is a compelling ethical justification to do
otherwise. Rules that are judged unethical should be challenged. A rule may be unethical when
it has an inadequate moral basis or causes recognizable harm. A computing professional should
consider challenging the rule through existing channels before violating the rule. A computing
professional who decides to violate a rule because it is unethical, or for any other reason, must
consider potential consequences and accept responsibility for that action.
2.4 Accept and provide appropriate professional review.
High quality professional work in computing depends on professional review at all stages.
Whenever appropriate, computing professionals should seek and utilize peer and stakeholder
review. Computing professionals should also provide constructive, critical reviews of others'
work.
2.5 Give comprehensive and thorough evaluations of computer systems and their impacts, including analysis of possible risks.
Computing professionals are in a position of trust, and therefore have a special responsibility to
provide objective, credible evaluations and testimony to employers, employees, clients, users,
and the public. Computing professionals should strive to be perceptive, thorough, and objective
when evaluating, recommending, and presenting system descriptions and alternatives.
Extraordinary care should be taken to identify and mitigate potential risks in machine learning
systems. A system for which future risks cannot be reliably predicted requires frequent
reassessment of risk as the system evolves in use, or it should not be deployed. Any issues that
might result in major risk must be reported to appropriate parties.
2.6 Perform work only in areas of competence.
A computing professional is responsible for evaluating potential work assignments. This
includes evaluating the work's feasibility and advisability, and making a judgment about whether
the work assignment is within the professional's areas of competence. If at any time before or
during the work assignment the professional identifies a lack of a necessary expertise, they
must disclose this to the employer or client. The client or employer may decide to pursue the
assignment with the professional after additional time to acquire the necessary competencies, to
pursue the assignment with someone else who has the required expertise, or to forgo the
assignment. A computing professional's ethical judgment should be the final guide in deciding
whether to work on the assignment.
2.7 Foster public awareness and understanding of computing, related technologies, and their consequences.
As appropriate to the context and one's abilities, computing professionals should share
technical knowledge with the public, foster awareness of computing, and encourage
understanding of computing. These communications with the public should be clear, respectful,
and welcoming. Important issues include the impacts of computer systems, their limitations,
their vulnerabilities, and the opportunities that they present. Additionally, a computing
professional should respectfully address inaccurate or misleading information related to
computing.
2.8 Access computing and communication resources only when authorized or when compelled by the public good.
Individuals and organizations have the right to restrict access to their systems and data so long
as the restrictions are consistent with other principles in the Code. Consequently, computing
professionals should not access another's computer system, software, or data without a
reasonable belief that such an action would be authorized or a compelling belief that it is
consistent with the public good. A system being publicly accessible is not sufficient grounds on
its own to imply authorization. Under exceptional circumstances a computing professional may
use unauthorized access to disrupt or inhibit the functioning of malicious systems; extraordinary
precautions must be taken in these instances to avoid harm to others.
2.9 Design and implement systems that are robustly and usably secure.
Breaches of computer security cause harm. Robust security should be a primary consideration
when designing and implementing systems. Computing professionals should perform due
diligence to ensure the system functions as intended, and take appropriate action to secure
resources against accidental and intentional misuse, modification, and denial of service. As
threats can arise and change after a system is deployed, computing professionals should
integrate mitigation techniques and policies, such as monitoring, patching, and vulnerability
reporting. Computing professionals should also take steps to ensure parties affected by data
breaches are notified in a timely and clear manner, providing appropriate guidance and
remediation.
To ensure the system achieves its intended purpose, security features should be designed to be
as intuitive and easy to use as possible. Computing professionals should discourage security
precautions that are too confusing, are situationally inappropriate, or otherwise inhibit legitimate
use.
In cases where misuse or harm are predictable or unavoidable, the best option may be to not
implement the system.
3. PROFESSIONAL LEADERSHIP PRINCIPLES.
Leadership may either be a formal designation or arise informally from influence over others. In
this section, “leader” means any member of an organization or group who has influence,
educational responsibilities, or managerial responsibilities. While these principles apply to all
computing professionals, leaders bear a heightened responsibility to uphold and promote them,
both within and through their organizations.
A computing professional, especially one acting as a leader, should…
3.1 Ensure that the public good is the central concern during all professional computing work.
People—including users, customers, colleagues, and others affected directly or indirectly—
should always be the central concern in computing. The public good should always be an
explicit consideration when evaluating tasks associated with research, requirements analysis,
design, implementation, testing, validation, deployment, maintenance, retirement, and disposal.
Computing professionals should keep this focus no matter which methodologies or techniques
they use in their practice.
3.2 Articulate, encourage acceptance of, and evaluate fulfillment of social responsibilities by members of the organization or group.
Technical organizations and groups affect broader society, and their leaders should accept the
associated responsibilities. Organizations—through procedures and attitudes oriented toward
quality, transparency, and the welfare of society—reduce harm to the public and raise
awareness of the influence of technology in our lives. Therefore, leaders should encourage full
participation of computing professionals in meeting relevant social responsibilities and
discourage tendencies to do otherwise.
3.3 Manage personnel and resources to enhance the quality of working life.
Leaders should ensure that they enhance, not degrade, the quality of working life. Leaders
should consider the personal and professional development, accessibility requirements,
physical safety, psychological well-being, and human dignity of all workers. Appropriate human-
computer ergonomic standards should be used in the workplace.
3.4 Articulate, apply, and support policies and processes that reflect the principles of the Code.
Leaders should pursue clearly defined organizational policies that are consistent with the Code
and effectively communicate them to relevant stakeholders. In addition, leaders should
encourage and reward compliance with those policies, and take appropriate action when
policies are violated. Designing or implementing processes that deliberately or negligently
violate, or tend to enable the violation of, the Code's principles is ethically unacceptable.
3.5 Create opportunities for members of the organization or group to grow as professionals.
Educational opportunities are essential for all organization and group members. Leaders should
ensure that opportunities are available to computing professionals to help them improve their
knowledge and skills in professionalism, in the practice of ethics, and in their technical
specialties. These opportunities should include experiences that familiarize computing
professionals with the consequences and limitations of particular types of systems. Computing
professionals should be fully aware of the dangers of oversimplified approaches, the
improbability of anticipating every possible operating condition, the inevitability of software
errors, the interactions of systems and their contexts, and other issues related to the complexity
of their profession—and thus be confident in taking on responsibilities for the work that they do.
3.6 Use care when modifying or retiring systems.
Interface changes, the removal of features, and even software updates have an impact on the
productivity of users and the quality of their work. Leaders should take care when changing or
discontinuing support for system features on which people still depend. Leaders should
thoroughly investigate viable alternatives to removing support for a legacy system. If these
alternatives are unacceptably risky or impractical, the developer should assist stakeholders'
graceful migration from the system to an alternative. Users should be notified of the risks of
continued use of the unsupported system long before support ends. Computing professionals
should assist system users in monitoring the operational viability of their computing systems,
and help them understand that timely replacement of inappropriate or outdated features or
entire systems may be needed.
3.7 Recognize and take special care of systems that become integrated into the infrastructure of society.
Even the simplest computer systems have the potential to impact all aspects of society when
integrated with everyday activities such as commerce, travel, government, healthcare, and
education. When organizations and groups develop systems that become an important part of
the infrastructure of society, their leaders have an added responsibility to be good stewards of
these systems. Part of that stewardship requires establishing policies for fair system access,
including for those who may have been excluded. That stewardship also requires that
computing professionals monitor the level of integration of their systems into the infrastructure of
society. As the level of adoption changes, the ethical responsibilities of the organization or
group are likely to change as well. Continual monitoring of how society is using a system will
allow the organization or group to remain consistent with their ethical obligations outlined in the
Code. When appropriate standards of care do not exist, computing professionals have a duty to
ensure they are developed.
4. COMPLIANCE WITH THE CODE.
A computing professional should…
4.1 Uphold, promote, and respect the principles of the Code.
The future of computing depends on both technical and ethical excellence. Computing
professionals should adhere to the principles of the Code and contribute to improving them.
Computing professionals who recognize breaches of the Code should take actions to resolve
the ethical issues they recognize, including, when reasonable, expressing their concern to the
person or persons thought to be violating the Code.
4.2 Treat violations of the Code as inconsistent with membership in the ACM.
Each ACM member should encourage and support adherence by all computing professionals
regardless of ACM membership. ACM members who recognize a breach of the Code should
consider reporting the violation to the ACM, which may result in remedial action as specified in
the ACM's Code of Ethics and Professional Conduct Enforcement Policy.
The Code and guidelines were developed by the ACM Code 2018 Task Force: Executive Committee Don Gotterbarn
(Chair), Bo Brinkman, Catherine Flick, Michael S Kirkpatrick, Keith Miller, Kate Varansky, and Marty J Wolf.
Members: Eve Anderson, Ron Anderson, Amy Bruckman, Karla Carter, Michael Davis, Penny Duquenoy, Jeremy
Epstein, Kai Kimppa, Lorraine Kisselburgh, Shrawan Kumar, Andrew McGettrick, Natasa Milic-Frayling, Denise
Oram, Simon Rogerson, David Shama, Janice Sipior, Eugene Spafford, and Les Waguespack. The Task Force was
organized by the ACM Committee on Professional Ethics. Significant contributions to the Code were also made by
the broader international ACM membership. This Code and its guidelines were adopted by the ACM Council on June
22nd, 2018.
This Code may be published without permission as long as it is not changed in any way and it carries the copyright
notice. Copyright (c) 2018 by the Association for Computing Machinery.
