+**D04** refers to a designated identifier, often marking a specific iteration or phase in complex processes. It frequently denotes a particular [Data Set](/wiki/data_set) or a version within a [Software Module](/wiki/software_module) lifecycle.
+## See also
+- [Identifier](/wiki/identifier)
+- [Version Control](/wiki/version_control)
+- [System Design](/wiki/system_design)
... 1 more lines