PROCESS ALGEBRA A computer process is a program or section of a program (such as a function) in execution. It may be in one of the following states: ready, running, waiting, or terminated. A process algebra is a concise language for describing the possible execution steps of computer processes. It has a set of operators and syntactic rules for specifying a process using simple, atomic components. It is usually not a logic-based language. Central to process algebras is the notion of equivalence,