"IT'S apparent during the opening credits of "Alien 3" that this is going to be a movie for the generation that finds the computer friendly. Those of us born before 1975 can't possibly comprehend all of the introductory information that goes clicking across the on-screen television monitor, spelling out time, place and imminent crises with the relentlessness of a speed-reading exam. The information is also so understated that only someone who speaks computer language realizes that life, as we know it, is about to crash. Yet again. What the computer generation knows, and the rest of us don't, is that this information isn't really necessary or especially relevant. Logic is out. Visceral sensation is the point. Unlike "Alien" (1979) and "Aliens" (1986), the new film, directed by David Fincher, puts no great emphasis on futuristic technology. "Alien 3" belongs to that branch of fantasy comics, best exemplified by the "Road Warrior" movies, in which the iron and space ages meet for dizzy results."