In the European Middle Ages goldsmiths used engraving to decorate and inscribe metalwork. The writer then uses a stylus to inscribe letters. Obsidian was used to inscribe the Rongorongo glyphs. Occasionally, one person chosen for her beautiful handwriting would inscribe all the signatures. These included things like reciting texts learned previously and forming new tablets to inscribe. Diptychs were also used to inscribe the names of the saints. Inscribe a square in the circle, so that its four corners lie on the circle. The Maya had specific techniques to create, inscribe, paint, and design pottery. The backup feature can now inscribe data to Blu-ray and HD DVD discs. Zu used the Liu Hui's algorithm described earlier by Liu Hui to inscribe a 12,288-gon. Some variations add feet to the fish and inscribe "Darwin" in the body. The head is somewhat triangular in inscribe. Inscribe the breath of the whole woman. Scribe was released and renamed as a commercial product InScribe in 2003.