Why do pills own lil numbers stamped on them? Is that for routing purposes?

I'm not sure me tummy can read those anyway.Why do pills own lil numbers stamped on them? Is that for routing purposes?
Yes those numbers are called Pills christening number and that is given by every businessman to get the identity of a perticular drug and adjectives those numbers are included in a book call Ident-A-Drug.
It's to help identify what the pill is, lacking having to break it down and analyze it.