Berkeley ist calmail

A classic!

"Berkeley is Calmail" is a humorous way of saying that the University of California, Berkeley (UC Berkeley) is synonymous with the Calmail system, which is the university's email service.

In other words, when someone says "Berkeley is Calmail", they're poking fun at the fact that UC Berkeley's email system is so ubiquitous and integral to campus life that it's almost as if the university itself is the email service.

This phrase is often used in a lighthearted or ironic way to acknowledge the importance of email in academic and professional settings, particularly in the context of higher education.