Computer technology developed by Microsoft
Also known as OLE Structured Storage · COM Compound File · OLE Compound File
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COM Structured Storage is a technology developed by Microsoft as part of its Windows operating system for storing hierarchical data within a single file. Strictly speaking, the term structured storage refers to a set of COM interfaces that a conforming implementation must provide, and not to a specific implementation, nor to a specific file format. In addition to providing a hierarchical structure for data, structured storage may also provide a limited form of transactional support for data access. Microsoft provides an implementation that supports transactions, as well as one that does not.