Pigeon-hole messagebox

A pigeon-hole messagebox (commonly referred to as a pigeon-hole or pidge, a cubbyhole (often shortened to "cubby") or simply as a mailbox in some academic or office settings) is an internal mail system commonly used for communication in organisations, workplaces and educational institutes in the United Kingdom and other countries.

By the mid 19th century, pigeon hole was being used as a verb meaning either to put a matter to one side with the intention of coming back to it later, or to classify information.

Cubbies are also used in American preschools and kindergartens as places to store backpacks, lunchboxes, and jackets.

Pigeon-hole message boxes are also used in research institutions, libraries, and archives to provide researchers with secure access to archival records, rare books, and other unique material that cannot be removed from the premises.

In large organisations the mailboy delivers mail to departmental pigeon holes from the postroom (UK) or mailroom (US).