An array of figures from technology, entertainment and politics assembled on the campus of Stanford University Sunday night to pay tribute to Steven P. Jobs, Apple’s late chief executive and co-founder.

Bill Clinton, Larry Ellison, Oracle chief executive, Bill Gates, Microsoft co-founder, and Michael Dell, Dell chief executive, were among the guests who attended a private service at Stanford’s Memorial Church, according to a person with knowledge of the event. Bono, the U2 lead singer, and the folk singer Joan Baez, who once dated Mr. Jobs, were also there, as was John Lasseter, who worked with Mr. Jobs at Pixar, the animation studio that Mr. Jobs develped and later sold to Walt Disney.

Guests arrived to find tight security surrounding the Apple-hosted event. A reception in the university’s Rodin Sculpture Garden was scheduled to follow the service.

While there were few details available about who spoke at the memorial, the British actor and technophile Stephen Fry, who knew Mr. Jobs, posted a note to Twitter Sunday evening describing his reaction to a memorial, though he didn’t say explicitly that it was the event to honor Mr. Jobs. “I don’t know that there was ever a more beautiful memorial service,” Mr. Fry wrote. “Everyone who spoke did so with such passion and love and simplicity.”

Mr. Jobs died on October 5 after a long struggle with pancreatic cancer. Jerry Brown, California governor, announced on Friday that Sunday was Steve Jobs Day in the state. Apple will host a private event for employees this Wednesday to honor Mr. Jobs on the company’s Cupertino, Calif., campus.

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