Quoting Scott from this article:
He routinely cites the tech giant’s origins as a startup formed by a group of Stanford and University of California-Berkeley students who early on had to decide what to call their company.
“The big decision was to call it Stanford University Network or Berkeley University Network, and ‘Sun’ won over ‘Bun,’?” he quipped. “We’ve always been looking to pay back, share back, if you will.”
That means, I could have been working for a company called Bun Microsystems!