Software copyright refers to the legal protection afforded to computer programs and related documentation under copyright law. It grants the copyright holder exclusive rights to reproduce, distribute, create derivative works, and publicly perform or display the software, subject to the limitations and exceptions provided by national legislation and international treaties.
Legal basis
- International treaties: The Berne Convention for the Protection of Literary and Artistic Works (1886) and the Agreement on Trade‑Related Aspects of Intellectual Property Rights (TRIPS) extend copyright protection to “literary works,” which many jurisdictions interpret to include computer programs. The World Intellectual Property Organization (WIPO) Copyright Treaty (1996) specifically acknowledges software as a protected work.
- National statutes:
- United States: The Copyright Act of 1976 (Title 17 of the United States Code) treats computer programs as “literary works.” The seminal case Apple Computer, Inc. v. Franklin Computer Corp. (1983) affirmed that both source code and object code are protected.
- European Union: Directive 2009/24/EC on the legal protection of computer programs harmonises the treatment of software across member states, requiring member laws to protect both source and object code as literary works.
- Other jurisdictions: Canada, Japan, Australia, and many other countries have codified software copyright within their broader copyright frameworks, often mirroring the Berne standards.
Scope of protection
- Expression, not idea: Copyright protects the specific expression of software (e.g., source code, object code, documentation) but does not extend to underlying algorithms, functional concepts, or ideas, which may be eligible for patent protection in certain jurisdictions.
- Source and object code: Both forms are considered expressive works. Courts have consistently ruled that compiled binaries inherit the copyright of the original source.
- Derivative works: Modifications, translations, or adaptations of the original program—including ports to other platforms—are covered, and the creation of such works typically requires permission from the copyright holder.
- Bundled materials: User manuals, help files, and graphical user interface (GUI) elements may also be protected when they constitute original expression.
Exceptions and limitations
- Fair use / fair dealing: Many jurisdictions allow limited copying for purposes such as criticism, teaching, or research, provided the use is “fair” under statutory tests (e.g., the four‑factor fair use analysis in the United States).
- Reverse engineering: Some legal regimes permit decompilation for interoperability purposes. The EU Software Directive allows reverse engineering to achieve compatibility with independently created programs, subject to strict conditions.
- Archival copies: Libraries and archives may make preservation copies under specific statutory allowances.
Relation to other IP rights
- Patents: While copyright protects the expressive code, patents can protect novel, non‑obvious technical inventions embodied in software (e.g., specific algorithms or processes). The two regimes are independent; a single program may be covered by both.
- Trade secrets: Unpublished source code may also be protected as a trade secret if reasonable confidentiality measures are maintained, providing an alternative to public copyright registration.
Enforcement
- Civil remedies: Copyright owners may seek injunctions, statutory damages, and disgorgement of profits through civil litigation.
- Criminal sanctions: In many countries, willful infringement for commercial advantage can trigger criminal penalties, including fines and imprisonment.
- Digital Millennium Copyright Act (DMCA) and analogous statutes: Provide mechanisms for notice‑and‑takedown of infringing software distributions online and protect service providers from liability under certain conditions.
Notable cases
- Apple Computer, Inc. v. Franklin Computer Corp. (1983, U.S.) – Established that object code is protected by copyright.
- Computer Associates International, Inc. v. Altai, Inc. (1992, U.S.) – Introduced the “abstraction‑filtration‑comparison” test for software infringement analysis.
- SAS Institute Inc. v. World Programming Ltd. (2012, EU Court of Justice) – Clarified that copying the functionality of a program does not infringe copyright, but copying its expression does.
Open‑source and licensing
Software released under open‑source licenses (e.g., GPL, MIT, Apache) remains copyrighted; the license simply grants users defined rights to use, modify, and redistribute the work, often under conditions that preserve the original attribution and source availability.
Registration
- United States: Although copyright exists upon creation, registration with the U.S. Copyright Office provides additional benefits, such as eligibility for statutory damages and attorneys’ fees.
- Other jurisdictions: Some countries maintain voluntary registration systems (e.g., the UK’s Intellectual Property Office), while many rely solely on the principle of “automatic” protection without formal filing.
International considerations
Cross‑border enforcement relies on treaties such as the Berne Convention and the TRIPS Agreement, which require member states to recognize foreign copyrights and provide comparable remedies. However, practical enforcement can be affected by variations in procedural law, statutory limitations, and differing interpretations of fair use or reverse‑engineering exceptions.
