👉 The term "opisthography" is used to describe a type of writing system that was used in ancient Egypt. This writing system consisted of a series of horizontal lines, which were typically written horizontally and then laid down vertically on a surface called a papyrus or parchment. The characters were arranged in an oblique form, with the left hand holding the right hand's letter. The use of this writing system allowed for much greater flexibility in communication and was used extensively by ancient Egyptians to write mathematical
