abjad abugida alphabet aramaic alphabet batak languages baybayin buhid script diacritic grapheme history of the alphabet history of writing ideogram indonesia javanese script list of inventors of writing systems list of languages by first written accounts list of languages by writing system list of writing systems logogram lontara script pallava phoenician alphabet pictogram proto-canaanite alphabet rejang script sumatra syllabary undeciphered writing systems unicode writing system