The pic below is a blowup of a still from Alien showing a can of beer (held by Tom Skerritt), featuring the Weylan Yutani logo. This little detail was a pleasant surprise as I assumed the whole Weylan Yutani intruige came with the later films, but it appears the mythology-weaving was already underway. By the way, the still comes from a page I found called Typeset In the Future, which examines every bit of typography seen in the film (and elsewhere, 2001 and Moon). Well worth checking out. I love this kind of fan scholarship.