In computing the term '''core''' is most frequently found in the phrase '''[https://en.wikipedia.org/wiki/Core_dump%|%core dump]''', which derives from [https://en.wikipedia.org/wiki/Magnetic_core_memory%|%magnetic core memory]. Around here, '''core''' usually means [The Tcl Core] -- the [C] implementation of Tcl managed by the [Tcl Core Team]. Accordingly, the term "core command" refers to a [Tcl Commands%|%built-in] Tcl command. The use of the term "core" carries over to other programs. A core command of [incr tcl] would be one of the commands from the source distribution variations of that software as maintained by its project maintainers. ---- A core dump is the memory image that is produced if a program crashes and ''dumps core''. A core dump can be a valuable help for debugging the crash, if you are an expert in understanding [C] stack traces and particularly if you configured Tcl and the extensions with -enable-symbols. [DKF]: A ''core dump'' is like the corpse of a process on Unix. Sometimes, you just have to carry out an autopsy to satisfy the coroner... ** See Also ** [UPL: No Core - No Core Team] : <> Glossary