By default, Version 8 filenames are appended with an eight-character filename extension. For example, a Version 8 filename extension for a data set on the UNIX, OpenVMS, OS/2, and Windows hosts is ...

¹ refers to Version 7 and later OS/390 UNIX System Services Directory. ² refers to Version 7 and later OS/2 and Windows short filename extensions. For details about conditions under which short ...

A file extension is a suffix that is added to the end of a file name after a dot. It is usually two to four letters long. File extensions help Windows and other operating systems to know the standard ...

Apple has released several new and revised Developer Release Notes. We post two examples below. Because of our recent coverage of the file name extensions vs. Type/Creator controversy, we offer an ...

The latest issues of the MDJ explore a continuing controversy with Mac OS X. While not a new controversy, a new feature in Mac OS X 10.1 brings it to the foreground again. The articles are too long to ...

In the Mac OS it is possible to change the default program the operating system will use to open a file when you double-click on it. After you have changed this file association, though, you may want ...