What is an Activator? Like thesauruses, Longman Activators? helpstudents develop their vocabulary by taking them from key words andbasic ideas and guiding them to exactly the right word or phrase theyneed for a particular context or situation - guaranteeing naturalsounding English. Includes 42,000 words, phrases and examples. TheCD-ROM guides students through all stages of writing an essay, withpractice and samples and also includes the full contents of theLongman Active Study Dictionary.