YA, yA, or Ya may refer to:
Yahoo! Inc. is an American multinational technology company headquartered in Sunnyvale, California. Yahoo was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 2, 1995. Yahoo was one of the pioneers of the early internet era in the 1990s.
The Yazidis (also Yezidis, Êzidî; /jəˈziːdiːz/ yə-ZEE-dees) are an ethnically Kurdish religious community or an ethno-religious group indigenous to northern Mesopotamia (see also Ezidkhan) who are strictly endogamous.
The Yangtze River (English pronunciation: /ˈjæŋtsi/ or /ˈjɑːŋtsi/), known in China as the Cháng Jiāng ( listen; literally: "Long River") or the Yángzǐ Jiāng ( listen), is the longest river in Asia and the third-longest in the world.
Yakuza (ヤクザ, [jaꜜkuza]), also known as gokudō (極道, "the ultimate path"), are members of transnational organized crime syndicates originating in Japan.
Yahoo! Mail, a web-based email service, launched in 1997 through the American parent company Yahoo!. Yahoo!