书牍

Traditional form:

書牘

Pinyin (reading):

shūdú

Definitions:

• letter
• wooden writing strips (arch.)
• general term for letters and documents

Characters:

• 书 - book, letter, document; writing
• 牍 - writing tablet; documents, books

Traditional characters:

• 書 - book, letter, document; writing
• 牘 - writing tablet; documents, books