meaning of calculator
1.  One who computes or reckons: one who estimates or considers the force and effect of causes, with a view to form a correct estimate of the effects. 
2.   calculator bitty box Calculus of Communicating Systems CCS A mathematical model a formal language for describing processes, mostly used in the study of parallelism.   A CCS program, written in behaviour expressions syntax denotes a process behaviour.   Programs can be compared using the notion of observational equivalence.  ["A Calculus of Communicating Systems", LNCS 92, Springer 1980].  ["Communication and Concurrency", R.  Milner, P-H 1989]. 
3.  a small machine that is used for mathematical calculations
						 
