The memo arrived on paper.
Because it was 1994.
A notice, to all NPR staff, proclaiming, "Internet is coming to NPR!"
And there was no directive to log on to this fast-growing "organization," by the way. "If you do not want to use Internet," the memo read, "simply do nothing."
You can see more highlights from NPR's pre-Internet days at the Nprchives Tumblr.