Abecedarium

The Anglo-Saxon futhorc (abecedarium anguliscum)
An Early Cyrillic abecedarium on birch bark document № 591 from ancient Novgorod (Russia). Dated to 1025–1050 AD.
Folio 1 of the Codex Gigas, showing Hebrew, Greek, Latin, Glagolitic, and Early Cyrillic abecedaria

An abecedarium (also known as an abecedary or ABCs or simply an ABC) is an inscription consisting of the letters of an alphabet, almost always listed in order. Typically, abecedaria (or abecedaries) are practice exercises.