[[Document the [tcl] core subsystems]]

'''The key [Tcl 8.5] subsystems'''
   * Basic utilities (dynamic strings, hashtables, memory allocator)
   * Value system ([Tcl_Obj], etc.)
   * Multi-precision integer support library
   * Interpreter core (including procedures, variables and traces)
   * Bytecode engine
   * Namespaces
   * Event handler
   * I/O and [encoding] engine
   * Virtual Filesystem engine
   * Regular Expression engine
   * Package manager
   * The [clock] command
   * Child interpreter manager
   * Thread support


Note that there are other minor subsystems too (e.g. the [format] and [scan] commands), and that the full list of maintenance areas[http://tip.tcl.tk/16.html] may divide some subsystems into several pieces for ease of maintenance. ''-- [DKF]''

----
Various pages dealing with Tcl internals topics include:

   * [History of TCL_EVAL_INVOKE]

----
!!!!!!
%| [Category Internals] |%
!!!!!!