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[[Sharp Corporation|SHARP]] calls this method '''Direct algebraic logic (D.A.L.)'''.
[[Casio]] calls this method '''Visually Perfect Algebraic Mode (V.P.A.M)'''<ref>[http://support.casio.com/answer.php?rgn=5&cid=004002002001&qid=24370&num=7 What does VPAM stand for]</ref><ref>[http://edu.casio.com/products/adves/fx991esplus/ Visually Perfect Algebraic Mode (V.P.A.M) - Scientific calculator]</ref> or '''Natural textbook display'''<ref>[http://edu.casio.com/products/ntd/fx991es/ Natural textbook display - Scientific calculator]</ref><ref>[http://edu.casio.com/products/graphic/fx9860g2/ Natural textbook display - Graphic calculator]</ref> on its [[Casio 9860 series|9860]] graphic calculators.
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