Back in the early 80s, I had an Commodore SX-64 briefcase computer. It was pretty cool. It had 64K RAM, one 5 1/4" floppy disk drive, a cartridge slot, a 300 Baud modem, and a 5" color monitor.     In the early 90s, I had a DX-66 Intel 486 PC. It had 8M RAM, a 3.5" floppy, a 500M hard drive and no Internet access. I used it to play games with, mostly.   In 2000, I inherited from my brother a Pentium I 90Mhz system that I would consider my first "modern" system. It had 90M RAM, a 2Gig hard