In the world:

March 15, 44 B.C. — Gaius Julius Caesar is stabbed to death in the Roman Senate house. Et tu, Brute?

March 13, 1969 — Herbie “The Love Bug” debuts. The original Herbie movie was followed by four theatrical sequels (the latest in 2005), a TV series and a made-for-TV remake.

At Microsoft:

March 13, 1986 — Microsoft stock goes public at $21 per share, rising to $28 per share by the end of the first trading day. The initial public offering raises $61 million.

This above photo features Microsoft's executives on IPO day, including Frank Gaudette (far left), Jon Shirley (next to Frank) and Bill Gates.