Jaso or JASO may refer to:
- Jaso State, a princely state in British India
- Japanese Automotive Standards Organization (JASO), an organization that sets automotive standards in Japan
- JASO T904, a quality classification standard of four stroke motor oils - it contains JASO T904-MA, JASO T904-MA2 and JASO T904-MB; see Motor oil#JASO
- JASO M345, a quality classification standard of two stroke motor oils – it contains JASO FA, JASO FB, JASO FC and JASO FD
- Journal of the Anthropological Society of Oxford, an academic anthropology journal
- Jaso (자소), a letter part that makes up a block in Korean writing, in type design or IME automata
People with the surname edit
- John Jaso, American former baseball player.
This disambiguation page lists articles associated with the title Jaso.
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