In 1970, graphic designer Tom Doerr selected the lower-case Greek letter lambda (λ) to be the symbol of the New York chapter of the Gay Activists Alliance.
The combined male-female symbol (⚦) is used to represent androgyne or transgender people further combined with the female (♀) and male (♂) symbols (⚧), it indicates gender inclusivity, though it is also used as a transgender symbol.
These symbols first appeared in the 1970s. Two interlocking female symbols (⚢) represent a lesbian or the lesbian community, and two interlocking male symbols (⚣) a gay male or the gay male community. Lesbian and gay interlocked gender sex symbols
