No one stronger than yahoo! I can just say this! American On Line Instant Messenger Or AOLIM that is one of the weakest instant messengers on the world and in my opinion the worst of them is just getting more bad every day ! in smiles, in text effect capabilities and in all things is very weak and unstable and very unexpected. Yahoo messenger even in 5.5 version belong a very graphical and user friendly environment and You will enjoy seeing and using it! Yahoo IMenvironments are great but you can not find such IMEs in AOLIM! You can not find smiles such as Yahoo smiles in AOL. AOL smiles are very unused, little and innumerouse and Paucity, But hidden and visible emoticons of yahoo messenger are Consumedly numerouse and you can not count them! Text effects that you use them in yahoo messenger chat, even are not found and used in MS word 2001! and in AOL low versions you can just use soild colors not gradiants and in higher versions just tow color gradiants! But the security in yahoo messenger is very lower than AOL messenger and trojan horses , hackers, virus programmers and attackers can easily hack and make attack on your computer by sending you viruses and trojan horses for example yahoo don’t know the viruses named anyname.bat and it thinks that it is a common file. when a hacker decides to hack your computer and gather information from you and your computer files, or if that attacker hates you he can easily format your hard drive or break your monitor by sending a .bat file! and yahoo file transferring system can not recognize it because of low security and privacy policy! But in AOL instant messenger security is very high and no one hack you such easy like yahoo. and caching your password become very easy in yahoo but no way is to hacking the password of AOL. Yahoo features is so much. It has more than 1000 chat rooms with more than 500 user defined chat rooms but you can not find such chat rooms in AOL. just instant messenging is governing and public chat in rooms will not be found! AOL can be better than yahoo by trying! if American On Line managers and Administrators attempt to claim thier real station and place in instant messaging softwares!