How many letters does the top answer for “a librarian who classifies publications according to a categorial system” have?

The most common answer is cataloger (9 letters).

Crossword clue: a librarian who classifies publications according to a categorial system

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

cataloger 9 letters wn-def

a librarian who classifies publications according to a categorial system

cataloguer 10 letters wn-def

a librarian who classifies publications according to a categorial system