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Using the MOS commands to access File functionality.
The MOS interface is a way of accessing system functions such as delete, rename and so on, in one of three ways
- they can be typed in at the command line with an asterisk (e.g. *del myfile.txt)
 - they can use the API function which takes a string in group 2
 - they can use the BASIC command which takes a string (e.g. mos "del myfile.txt" )
 - they can use the BASIC function which takes a string (e.g. print mos("del myfile.txt") )
 
Parameters can be delimited using spaces, single quotes or double quotes
The following commands are supported
- . or cat , same as CAT, directory listing with mask
 - *del (file) deletes a file
 - *copy (file1) (file2) copies a file
 - *file (file) checks a file exists
 - *ren (file1) (file2) renames a file
 - *md (directory) create directory
 - *cd (directory) change to directory
 
These commands should remain unchanged but may be extended arbitrarily.