Opening a document by double-clicking its icon

Before you can open a DOS document by double-clicking its icon, you need
to use the PC Exchange control panel to specify which Macintosh application
programs will open DOS documents, as described next.
Assigning Macintosh pr ograms to D OS do cuments
Using the PC Exchange control panel, you can assign Macintosh application
programs to DOS documents. For example, you can specify that all DOS
documents whose filenames end with the suffix .XLS are to be opened in the
Macintosh program Microsoft Excel.
The figure below shows the PC Exchange control panel with some
assignments already created.
142 Appendix
…are to be opened by this
Macintosh program…
DOS documents
whose names end
with this suffix…
…as this type
of document.