-what are the norms or the scripts form and style?

:1- How it was deciphered and by who ?2-what did help or became very useful to decipher the scripts?3-what features dose the scripts contain ?and what are the sequences of decipherment?4-what are the norms or the scripts form and style?5-what are the origin in that area?6-what are the descriptions of the scripts texts ?7-who take advance and what it is?-