TY - JOUR Y1 - 1995/// SP - 391 A1 - De Nicola, Rocco A1 - Segala, Roberto SN - 0304-3975 EP - 423 PB - Elsevier VL - 138 UR - http://www.sciencedirect.com/science/article/pii/030439759592307J IS - 2 N2 - Input/output automata are a widely used formalism for the specification and verification of concurrent algorithms. Unfortunately, they lack an algebraic characterization, a formalization which has been fundamental for the success of theories like CSP, CCS and ACP. We present a many-sorted algebra for I/O automata that takes into account notions such as interface, input enabling, and local control. It is sufficiently expressive for representing all finitely branching transition systems; hence, all I/O automata with a finitely branching transition relation. Our presentation includes a complete axiomatization of the external trace preorder relation over recursion-free processes with input and output. JF - Theoretical Computer Science AV - none ID - eprints366 TI - A Process Algebraic View of Input/Output Automata ER -