Lex Luthor says below:

>> Steve Job's system supplied 'Get info'...allows you to easily change file type info...


I've never seen Apple's Get Info show file type info, if by "Type" you mean as in Type and Creator, neither of which Apple's Get Info displays. The terms "Type" and "Creator" in this context are specific terms referring to two four-character codes assigned to every file and application, at least until recent versions of OS X, where it's gradually being phased out. A file's Type and Creator can be very useful info, sometimes even necessary, depending on what you're doing. Apple is gradually transitioning away from assigning Type and Creator codes to files and apps, in favor of Windows-type filename extensions (who says Microsoft only copies Apple?), but this info is still often useful for older files and apps, and for newer ones that Apple is still assigning Type and Creator codes to.

Apple's Get Info's "Open with" option gives a method for bypassing a file's original Creator code, but it still doesn't let you see the four-character Creator code.