This file, included with A-Shell and normally found in DSK0:[907,16], provides a list of most symbols defined for use with routines embedded in A-Shell. Most applications using A-Shell functions, particularly GUI functions, will want to ++include ashell.def in every program. Note that doing so does not increase the size of the RUN file except for symbols that are actually used. A-Shell routines that have traditionally been distinct from A-Shell have their own symbol definition files (i.e., mmosym.def for INMEMO), and most SBX routines also have their own symbol definition (.def) files.