"Gelernter's group takes Gibson's cyberspace and twists it around the temporal axis. You hear this in its description of Lifestreams: 'Every document you've ever created or received stretches before you in a time-ordered stream, reaching from right now backward to the date you were born. You can sit back and watch new documents arrive: they're plunked down at the head of the stream. You browse the stream by running your cursor down it - touch a document in the display and it pops out far enough for you to glance at its contents. You can go back in time or go to the future and see what you're supposed to be doing next week or next decade. Your entire cyberlife is right there in front of you.'"