A good account is With Microscope and Tweezers: The Worm from MIT's Perspective [1], published in CACM a few months after the event. Notice it was the worm. I was an intern at IBM in '88 and they shut-down the (iirc) two internet getaways to their corporate network (vnet) while people figured out what was going on. News moved slowly back then, and the idea of self-replicating software was unusual. Although IBM had ha…
> the idea of self-replicating software was unusual floppy based viruses were well established and quite common
The Mac's ease of use as opposed to the PC made it also the juiciest virus target.