Gurmukhi is an alphabetic abugida developed from the Laṇḍā scripts and was standardised during the 16th century by Guru Angad, the second guru of Sikhism. The Old Punjabi word Gurmukhī means "from the mouth of the Guru". The whole of the Guru Granth Sahib is written in this script, and it is the script most commonly used by Sikhs and Hindus for writing the Punjabi language.