[chriswarbo]

w3 is written in ELisp and runs in Emacs http://www.emacswiki.org/emacs/w3

w3m is an external program, which Emacs has a wrapper for http://www.emacswiki.org/emacs/w3m

[Derbasti]

My apologies then, since I did not remember correctly. Thank you for enlightening!