A handheld children's drawing toy. Magnetic particles under its screen are drawn (attracted) to the surface using magnets, which usually take the form of a stylus.

Synonym of bulletin board system

A scientific method of measuring anxiety, stress, neophilia and emotionality in animals, involving an enclosed area with a floor covered in holes that the animal may or may not choose to explore.

plural of hole-board test

plural of transport safety board

plural of transportation safety board

(UK, historical) A board of officials responsible for auditing the accounts of the royal household, making royal travel arrangements, and sitting as a court upon offences committed within the verge of the palace. More recently its jurisdiction was limited to alcohol sales and gambling licences, and it was abolished in 2004.

plural of semi-boarding school

(computing, historical) A type of computer system, now largely obsolete, used to exchange messages and data over a telecommunications network.

(idiomatic) All over the map.