Maharishi Panini was a Kashmiri Brahmin who was born in Śalātura in northwest India, north of the confluence of the Sindhu and the Kabul rivers. The Geographical area of Kashmir was bigger then. It was a large and big northeast region. 
Panini was a Sanskrit grammarian who gave a comprehensive and scientific theory of phonetics, phonology, and morphology. Sanskrit was the classical language of the Hindus and Panini is considered the founder of the language and literature.
A treatise called Astadhyayi (or Astaka ) is Panini's major work. It consists of eight chapters, each subdivided into quarter chapters. In this work, Panini distinguishes between the language of sacred texts and the usual language of communication.
He gives formal production rules & definitions to describe Sanskrit grammar. Starting with about 1700 basic elements like nouns, verbs, vowels, consonants he put them into classes. In many ways, his constructions r similar to the way that a mathematical function is defined today.
