# What's the complete list of file name extensions used by Mathematica?

What's the complete list of file name extensions used by Mathematica? The ones I know are

Before V8

.m
.nb
.mt


After V9:

.cdf


Anything else (and their introduction time)?

Two that you left out were extension .mx (V4) and extension .wl (V10)
• With the advent of .wl, is there a test file analogue to .mt? Is it .wlt? Oct 15, 2014 at 5:34