CSE is a tiny editor for MSDOS.  It is designed to take the place of the line
editor, EDLIN, that comes with DOS, and it provides full screen editing.
 
CSE can be placed and invoked from any directory that is listed in the PATH
statement found in your AUTOEXEC.BAT.  In order for CSE to find its key 
command profile and its help file you must set the environment variable 
CSE equal to the fully qualified path to CSE and its files.  For example
if you placed CSE.COM, CSE.HLP, and PROFILE.CSE in your C:\BIN directory then
you need to add the following statement to your AUTOEXEC.BAT:
 
SET CSE=C:\BIN
 
You will then be able to invoke 'CSE filename' from any prompt or drive on
your system.  Typing 'CSE' without a filename will create an unnamed file 
and place it in the edit window.  From then on the file may be edited on 
the screen.  Hit ESC to move from the command line to the file.  Hit F1
for help screen.   Best news is CSE is PUBLIC DOMAIN!
 
See the CSE.DOC file for complete operating instructions...  Once YAM/ZCOMM
is loaded, hitting Alt-F9 will load PHOMAST.T into the CSE editor so you can
modify the phones file as needed...