Document format

.doc

Microsoft Word Document (Legacy)

DOC is the legacy binary format used by Microsoft Word before 2007. While still widely encountered, it has been superseded by DOCX. Many older documents and templates still use this format.

MIME type

application/msword

Developer

Microsoft

Introduced

1983

Advantages

  • Universal recognition
  • Compatible with older Word versions
  • Still supported by all major office suites
  • Extensive installed base of existing documents

Limitations

  • Larger file sizes than DOCX
  • Binary format — harder to recover if corrupted
  • Limited to older feature set
  • Being phased out in favor of DOCX

When to use DOC

Opening legacy documents
Compatibility with older systems
Template archives
Government and institutional legacy files

Technical details

DOC uses the Microsoft Compound Binary File Format (OLE2). It stores text, formatting, images, and embedded objects in a binary stream structure.

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