alphabetism

He rejects what he calls the "alphabetism" of linguistics (Beitrage 2: 446) and suggests movement away from the historical-comparative approach of philology towards psychology.

Flat Worlds, Earth Literacy, and Map Alphabetism (Write-up comparing other world maps.)

A three-letter acronym, three-letter abbreviation, or TLA is an abbreviation, specifically an acronym, alphabetism, or initialism, consisting of three letters.

Whilst an abbreviation is the shortened form of any initial, syllable or parts of a phrase or words, an initialism (or less commonly, alphabetism) refers to an abbreviation formed from, and used simply as, a string of initials.