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copied!<p>Below is a brief explanation. (Parts are copied from the scala doc). Let me know if there is something that you dont understand and I will try to be more specific and give you a concrete example.</p> <p><strong>abstract class scala.actors.Future</strong> -- Are you familiar with <a href="http://download.oracle.com/javase/6/docs/api/java/util/concurrent/Future.html" rel="nofollow">java.util.concorrent.Future</a>? <em>scala.actors.Future</em> basically represents the result of an asynchronous computation but for <em>actors</em>.</p> <p><strong>scala.actors.Futures</strong> -- An object (~singleton) that contains four utility methods for handling <em>scala.actors.Future</em>.</p> <p><strong>scala.parallel.Future</strong> -- (This one was new to me, but it contains very basic operations (apply and isDone)) its a function without parameters that will block the caller if the parallel computation associated with the function is not completed. (function? hint: extends () ) </p> <p><strong><a href="http://www.scala-lang.org/api/current/scala/collection/parallel/FutureThreadPoolTasks.html" rel="nofollow">scala.collection.parallel.FutureThreadPoolTasks</a></strong> -- From the scala doc: "An implementation of tasks objects based on the Java thread pooling API and synchronization using futures." Is that enough? :)</p> <p><strong>scala.concurrent.FutureTaskRunner</strong> -- Are you familiar with <a href="http://download.oracle.com/javase/1.5.0/docs/api/java/util/concurrent/Executor.html" rel="nofollow">Executor</a>? <a href="http://www.scala-lang.org/archives/downloads/distrib/files/nightly/docs/library/scala/actors/scheduler/ExecutorScheduler.html" rel="nofollow">ExecutorScheduler</a> is one (out of three) concrete implementations in the scala standard library. <em>executeFromActor</em> is one of the more interesting methods and should give you a hint about when you need to use this one</p>

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