The culture of Punjab encompasses the spoken language, written literature, cuisine, science, technology, military warfare, architecture, traditions,sacrifices, values and history of the Punjabi people native to the northern part of the Indian subcontinent. The term 'Punjabi' can mean both a person who lives in Punjab and also a speaker of the Punjabi language. This name originates from the Persian language 'panj', (five), and 'ab', (water). In Rigvedic times, this area was called Sapta Sindhu or 'Seven Rivers' illustrating the extent of Undivided Punjab. Indus River (the largest river in this five river system), and the five other rivers to the south eventually join Indus or merge into it later in the downstream of the Punjab valley. All the rivers start and flow out of the Himalayas. These other five rivers are Jhelum River, Chenab River, Ravi River, Beas River and Sutlej River.