I don't recall seeing USB (granted, this was my limited view as a teenager at the time) until the late 90's and I don't think I had a PC with USB until at least

I don't recall seeing USB (granted, this was my limited view as a teenager at the time) until the late 90's and I don't think I had a PC with USB until at least 2000 or 2001. My girlfriend at the time started college in Fall 1999 and got a new laptop. She later got a CD burner and I remember it hooked up via serial port. It definitely took a few years to see it become common. Mac may have been the first to really push it, but that would have been late-90's as well, post-Jobs' return.