Baybayin (, Tagalog pronunciation: [bajˈbajɪn]), also sometimes erroneously referred to as alibata, is a Philippine script widely used primarily in Luzon during the 16th and 17th centuries and prior to write Tagalog and to a lesser extent Visayan languages, Kampampangan, Ilocano, and several other Philippine languages.
Baybayin is an abugida belonging to the family of the Brahmic scripts. Its use was gradually replaced by the Latin alphabet during Spanish rule, though it has seen limited modern usage in the Philippines.The script is encoded in Unicode as Tagalog block since 1998 alongside Buhid, Hanunoo, and Tagbanwa scripts.The Archives of the University of Santo Tomas in Manila holds the largest collection of extant writings using Baybayin.