The main difference that users notice between [[AIM]] and ICQ is that ICQ issues a Universal Internet Number, or UIN, whereas AIM lets users choose their own screen name. Both AIM and ICQ are owned by the same corporation, [[Time Warner]], so AIM users and ICQ users can freely message each other without the need of having to download any other software. | The main difference that users notice between [[AIM]] and ICQ is that ICQ issues a Universal Internet Number, or UIN, whereas AIM lets users choose their own screen name. Both AIM and ICQ are owned by the same corporation, [[Time Warner]], so AIM users and ICQ users can freely message each other without the need of having to download any other software. |