Patrick tells you to consult the ruby reference doc for definitions... put in ri plus the word you need defined,I put it in run but that hasn't worked too well. so I look around...I look at the first edition of ruby programing and then I look at the API again, both don't seem to explain much, for example there are hundreds of classes listed in the API, so I click on one...and all the information I see doesn't explain the purpose of the class or the instance methods. Where is there info that explains the purpose of each class and method.