It corresponds to the similarly named feature available in some assemblers for Intel processors. The C struct directly references a contiguous block of physical memory, usually delimited (sized) by word-length boundaries.
The struct data type can contain other data types so is used for mixed-data-type records such as a hard-drive directory entry (file length, name, extension, physical address, etc.), or other mixed-type records (name, address, telephone, balance, etc.). A struct in the C programming language (and many derivatives) is a composite data type (or record) declaration that defines a physically grouped list of variables under one name in a block of memory, allowing the different variables to be accessed via a single pointer or by the struct declared name which returns the same address.
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