Can some one tell me who and when invented Gurmukhi? As we can see the om as written in Hindi. And Ek Om Kar in Gurmukhi. They are not same. Did Nanak wrote in Gurmukhi? It looks like not. As I understand from the books. It was 2nd Guru who compiled not Nanak. I can not find any writing at the time of Nanak. So Nanak must have written in Hindi, Devnagri or brij. Which ever lip Nanak wrote it was not Gurmukhi. This ek omkar is written in Gurmukhi, Nanak did not write it then who wrote it? For some reason the image of OM and Ek omkar is not listed. I dont know why. But every one know what I am trying to show.