Google recently unveiled their 20 year archive of usenet postings. Here is the first mention of AIDS on usenet on December 20th, 1982. I was 16 years old at the time.

We had several computers in the house and school but I had no access to the net back then. At the Academy we played games to see who could write the programs which would consume the CPU's cycles at the expense of the others on the timeshare.

I think that year I both gave and received my first blow jobs. So long ago.