SHELL 1.3 shrinks to 368 bytes, then spawns a child, then restores
itself.  This program has no practical use, as is.  It is just
an EXEC teaching example.  It also acts as a skeleton you can
cannibalize to create your own real-life programs.  This program
has the following advantages over others of its kind in that:
1. it includes full OPTASM/MASM source.
2. It is stripped to minimal features for ease of understanding.
3. It is heavily commented.
4. This version swaps to disk, but it could be trivially be modified
   to swap to EMS, XMS etc.
5. The stub is small -- and may be configured even smaller.
This program is copyrighted but may be used freely for any
purpose except military.  Version 1.3 just displays the new
address and phone number.  You might also be interested in a
simplified version of this program called SPAWN.  SPAWN stays
resident where SHELL rolls itself out to disk before spawinng.