This brief paper introduces a small anonymous formal system representing the core theory of concurrent object-based computing. Milner's π-calculus is its underlying formalism, but the original calculus is reinterpreted and reformulated to become a simple and powerful expression of concurrent object-based computing. We briefly describe its underlying computational framework, its syntax, transition rules, semantic equivalence, and its special properties concerning "naming", which makes this calculus unique among various concurrency formalisms.