Important Dates
| May 15, 1999 | Pre-registration deadline |
| May 20, 1999 | Deadline for housing requests |
| June 22, 1999 | Last day for 50% refund of registration fees |
| July 10, 1999 | Postscript files are due for electronic volume |
| July 25-30, 1999 | DO'99 |
| July 30, 1999 | Deadline for handing in manuscripts for publication in the special issue of Discrete Applied Mathematics |
| September 15, 1999 | Deadline for late submissions of manuscripts for publication in the special issue of Discrete Applied Mathematics |