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On some systems, it can either be difficult (e.g. Windows 3.1)
or impossible (e.g., MACos) to spawn to system commands from within
IDL. For this reason, we have written the commands COPUF, DIRLIST
and SHOWTXT to allow file copying, directory listings and
displaying ASCII text files from within IDL. Use the prolog command
to get more information on the programs. Some examples are,
COPUF,'swp25303s.dat','modt.dat' copies an elbl file
DIRLIST,'*.pro' lists procedure files
SHOWTXT,'my.pro' displays file my.pro
2/9/1998