Specification may refer to:

• Specification is the term used for the first stage in cellular differentiation
• Specification (technical standard), an explicit set of requirements
• Specification (legal concept), from Roman Law
• Formal specification, describing computer software by mathematical means
  • Specification language
• Model specification, the practice of translating theory into a statistical model
• Patent specification, part of a patent application
• Regional specification, identifying different areas of the early embryo in biology

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