In the Jiangyong prefecture of China, a script emerged that was only used by women. at the time, women were not allowed formal education and could not read or write Chinese characters. It was a syllabic script, meaning each character was a syllable. This was Nüshu. A sample of characters and their Chinese equivalents--
This writing system is no longer in use. The last known user of Nüshu was Yang Huanyi, who died at the age of 98 in 2004.