Like other operating systems, OS/2 sets many program associations for you so that you do not need to worry about it. What do you do on those occasions where OS/2 doesn't create the association for you or associates files with the wrong program?
You select the correct program with which you want to associate files with a file type and open Properties by right clicking and selecting from the menu. Note that it is the program that you want not any of the data files.
One of the pages of the properties notebook is headed Associations and this is the page that you want. At the bottom left of the page you will find a field called New Name where you can type in new file types. Type in the value(s) that you require (one at a time) in the format *.xyz (where xyz is the file type) and press the Add > button (after each).
Data files with the specified file type will now be associated with this program instead of the system editor or whatever other program they were previously associated with.
Note that if you specify the same file type for multiple programs then the last association created will be the one that is used when you double click a data file. You can access the other associations by right clicking the data file and using the sub-menu attached to the arrow at the right hand end of the Open option.
This article written by Stephen Chapman, Felgall Pty Ltd.