Molecular beam epitaxy (MBE) is a textbook application of surface scie
nce which makes direct use of many of the tools for characterizing cle
an surfaces. The development of MBE coincided with the development of
these tools and thus the history of MBE is an important part of the hi
story of modern surface science. A subjective recounting of the early
history of MBE is presented, along with some biased conjectures about
the future.