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Descriptor may refer to:

  • Data descriptor, a software or hardware structure describing data
  • File descriptor, an abstract key for accessing a file
  • Molecular descriptor, which helps characterize a chemical compound
  • Visual descriptors, a representation of visual features in image or video
  • Security descriptor, a Windows data structure containing security information
  • Segment descriptor, used for memory addressing in x86 computer architectures
  • Short Payment Descriptor, a compact data format for an easy exchange of a payment information using modern electronic channels
  • Index term, also known as a "descriptor" in information retrieval
  • Epithet, a descriptive term (word or phrase), accompanying or occurring in place of a name and having entered common usage