I am typing this post with a computer on my lap. A perfect illustration of how far we have come in such a short time. Computers like the 5100 were the trailblazers for portable computing. It seems so jokey now, but I remember going into the high-tech offices of AT&T as a kid and being shown gigantic computers that did miraculous things. The idea that one of those machines could be mobile in some way was mind-blowing.