sex-segregated public bathrooms existed since at least the 1880s, originally labelled in writing | In 1974, the US Department of Transportation commissioned the American Institute of Graphic Arts to create a set of pictograms to be used throughout public transport networks whether road, rail, air or sea |
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The stick-figure pictograms were popularized with their introduction by British Rail in the 1960s |
Double interlocking female symbols are often been used [sic] to symbolize lesbianism, but some feminists have instead used the double female symbols to represent sisterhood among women and three interlocking female symbols to denote lesbianism.
17"The Origin of the Male and Female Symbols of Biology" | "One of the best early examples of intuitive global signs for public lavatories was that created for British Rail in the mid-1960s |
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