DOC（Microsoft Word 二进制文档）
DOC 是 Microsoft Word 1997 至 2003 版本使用的旧版二进制文件格式。它以专有的复合二进制结构存储格式化文本、图像和对象。虽然已被 DOCX 取代，但归档和旧系统中仍存在大量 .doc 文件。
MIME 类型
application/msword
类型
二进制
压缩
无损
优点
- + Universal compatibility with older Microsoft Office installations
- + Well-understood format with decades of tooling support
- + Supports macros, OLE objects, and VBA code
缺点
- − Proprietary binary format is hard to parse without specialized libraries
- − Larger file sizes compared to ZIP-compressed DOCX
- − Macro-enabled DOC files are a common malware vector
何时使用 .DOC
仅在需要兼容旧系统或 Word 97-2003 时使用 DOC；否则请转换为 DOCX 以获得更好的压缩率和互操作性。
技术细节
DOC 文件使用 Microsoft 的 OLE2 复合文件二进制格式，在虚拟文件系统中以流和存储的方式保存数据。文本、格式和嵌入对象在二进制流中交错排列。
历史
二进制 .doc 格式从 1980 年代末期开始经历了多个 Word 版本的演变。Word 97-2003 变体（OLE2 复合二进制格式）成为了办公文档的事实标准长达十余年。
从 .DOC 转换
转换为 .DOC
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