one of my instructors sent a file out in .ef format...


filename.ef

What program uses this?

 

if you have XP just double click and see what it recommends

 

it went off to nothingness... no page loaded when i did that.

 

http://filext.com/detaillist.php?extdetail=.ef

If the extension you are looking for is of the form .??_ the file is likely a compressed file and part of an install routine. When the install program runs it will expand the file and replace the underscore with the proper letter for the file type.