  Our society is digital: industry, science, governance, and individuals
depend, often transparently, on the inter-operation of large numbers of
distributed computer systems. Although the society takes them almost for
granted, these computer ecosystems are not available for all, may not be
affordable for long, and raise numerous other research challenges. Inspired by
these challenges and by our experience with distributed computer systems, we
envision Massivizing Computer Systems, a domain of computer science focusing on
understanding, controlling, and evolving successfully such ecosystems. Beyond
establishing and growing a body of knowledge about computer ecosystems and
their constituent systems, the community in this domain should also aim to
educate many about design and engineering for this domain, and all people about
its principles. This is a call to the entire community: there is much to
discover and achieve.
