I started with a U. S. Robotics
* 14.4kbps modem and upgraded to 28.8!
Before that I upgraded an Intel 80
286 processor motherboard to a 80
386 processor motherboard. Not a lot of speed improvement, but with Quarterdeck's QEMM386 software I could use the full 1mb of RAM, instead of just 640kb, and multi-task several DOS programs all at once!!!

Woo hoo! That was even better'n Windows 1.0 & 2.0. MS didn't even begin to get it right until Windows 3.01, then 3.11.
Don't get me started on early PC evolution! ... ... ...
*the
real U.S. Robotics company, not the one in the "I, Robot" movie.
.