Ok under my name it says MacRumors Newbie but under some peoples it says 6502 what does this mean. I have seen other numbers as well what do they mean?
They are the processors used in Macs over the years. They are in order and the longer the processor lasted in real life, the more posts required to leave that level.
Sorry...I misunderstood your question. Some of the links on this page some brief background info on the different processors and the machines they were used in.