select stockfile assign to "b:warehs.buy".
In this example, opening stockfile will cause the warehs.buy file on the b: drive to be opened.
select printfile assign to "prn:".
In this example, writing to printfile will cause data to be output to prn:, the first parallel printer.
select input-file assign to "data\prog".
In this example, opening input-file will cause the file prog in the data directory (relative to the current directory) to be opened.