In our november/december 1999 issue, technology review profiled 100 young innovators who we said were going to create the future. Now we're going to do it again.

The first "TR100" were a remarkable bunch, technologists and entrepreneurs whose accomplishments belied their youth (all were under 35 when chosen). We focused on youth as a way of helping our readers understand the future, which is, after all, our mission. We decided that it's way too hard to actually predict the future. (Even very smart people belly-flop when they try it.) But it is possible to identify some of those who will make large contributions to the not-too-distant future of technology, say the next decade or two.