Once he became a professional in computer-aided design, Visser was frequently called upon to train other architects on the system. He also developed software to further enhance architects' capabilities.

Characterizing her father as a fun person, Julie Visser, 23, of Huntington said, "He always knew how to cheer people up. In bad situations he would always know what to say to kind of make people smile and laugh, and enjoy the smaller things that are still around."

Kristi, 19, a sophomore at college, studying Japanese language and culture, recalled how family trips brought out the consummate planner in her dad.

"He'd research everything and know every little bit of it," Kristi said. "I never really thought about it, but who else was going to do that? It made it easier for everyone. It wasn't a burden to him. He enjoyed it."

In addition to his wife and daughters, Visser is survived by his parents, Rudy and Annelies Van den Assem Visser of Pennsylvania; sister, Verena Visser Aibel of New Jersey; and brother Kenneth Visser of Maryland. Donations in his memory may be made to The Waldorf School of Garden City, 225 Cambridge Avenue, Garden City, NY 11530 or at www.waldorfgarden.org.