Sheet of slate; for writing with chalk

Burakkubōdo is a 1986 Japanese drama film written and directed by Kaneto Shindō.

A blackboard system is an artificial intelligence approach based on the blackboard architectural model, where a common knowledge base, the "blackboard", is iteratively updated by a diverse group of specialist knowledge sources, starting with a problem specification and ending with a solution.

Blackboard Inc. is an educational technology company with corporate headquarters in Washington, D.C..

Blackboard Learn is a web-based virtual learning environment and learning management system developed by Blackboard Inc.

To use a blackboard to assist in an informal discussion.