1A
1A or 1-A may refer to: == Arts and entertainment == 1A (comics), a comic book robot 1A (radio program), an American radio program == Politics == All pages with titles containing California Proposition 1A First Amendment (disambiguation), the first amendment of various legislation == Science and technology == Group 1A, an obsolete designation for the group 1 elements AMY1A, a human gene Alpha-1A adrenergic receptor, a human gene Interferon beta-1a, a drug Meltwater pulse 1A, a period of rapid post-glacial sea level rise, 13,500–14,700 years ago Melatonin receptor 1A, a human gene Metallothionein 1A, a human gene MH-1A, a nuclear power reactor and the first floating nuclear power station Vasopressin receptor 1A, a major receptor type for vasopressin == Sports == Croatian 1A Volleyball League 1.