Creol is an object-oriented modeling language in which inherently concurrent objects exchange asynchronous method calls. The operational semantics of Creol is written in an actor-based style. formulated in rewriting logic. The operational semantics yields a language interpreter in the Maude system. http://www.ealisboa.com/mega-deal-OtterBox-Defender-Case-for-Samsung-Galaxy-S23-Ultra-top-savings/