digital mnemonics

With early antecedents in committing the pillars of Buddhism to heart or for a manual reckoning of the date of Easter for any year—the Venerable Bede’s ‘loquela digitorum’ of the eighth century—contributing correspondent for Public Domain Review Kensy Cooperrider guides on a comprehensive survey of the ways that people used the topologies of the hand and fingers as a mnemonic device (see also) as a way to recall processes and protocols, notation and geography. The illustration of the oversized Guidonian Hand (named after ninth century music theorist Guido d’Arezzo) was a choral aid to facilitate learning of sight-singing—or rather how to read a musical score, the first documented use of solfège. Spanning three full octaves and spilling into a fourth—from (ab) Α to Γ (Gamma) ut—this diagram is the source of the phrase ‘running the gamut,’ that is—the full range. Much more at the links above.