May 1999 timeline has 5 events: 3 releases, 0 ends of active support, 2 ends of life, 0 ends of extended support.
OpenBSD 2.3 reached its end of life.
OpenBSD 2.5 was released.
IBM iSeries 4.4 was released.
FreeBSD 3.0 reached its end of life.
FreeBSD 3.2 was released.
