I'm with +Luiz Soranço , this is the every day dinamic: the symbol gais its own life, accordin to purpose. Neverteless, we can dig out from the past when a symbol came to be, and this is beutiful. Technology is changing all the time, and human mind is also changing. Our language, uses, everything. It's frightening because years of hard work can be obsolete in a blink. But we can always start over, instead of being attached to stuff. I heard recordings, K7 and CD. I watched the MP3 invasion - and not without joy. In life, we must be ready for such things.