What unit of measurement is a BeV?

I am studying this paper by Gleeson and Axford from 1968. They often measure the energy of a particle in BeV: does it mean GeV, like a Billion of eV?

• Yes, that is an old way to say $10^9$ eV. It's what gave the Bevatron its name. Mar 2 '18 at 17:19

B is the prefix beva. It's an older prefix, but it checks out. It is equivalent to the SI prefix giga, $10^9$