ars notaria (10. 503)

Via Clive Thompson’s latest linkfest, which is a delight in itself to check in on often, we are introduced to the Cistercian system of ciphers, almost rune-like, developed by the monastic order parallel to the arrival of the Hindu-Arabic numerals in northwestern Europe which gradually replaced Roman notation, this stave system of units was far more compact and convenient for transcription as a single glyph could represent any value from one to ten-thousand. The pattern for forming higher numbers becomes apparent and later scholars expanded the system exponentially into the trillions. While seemingly not used for calculation, manuscripts from the thirteenth century show that they were used for numbering lists, indices, tables, musical notation and foliation—that is, page numbers. For more exploration and for a challenge (see also), click through to find source code to make a Cistercian clock.