Blackboard

A blackboard was a flat vertical surface used for writing on with chalk. 
20th century rocket scientist Robert H. Goddard used a blackboard for his profession. (, opening credits)
A 1960s classroom on contained a blackboard. ()
Professor 's lair included a blackboard. ()
In 2367, Noonien Soong's laboratory had a green blackboard. ()
Later that year, to Geordi La Forge's amazement, a hologram of wrote equations on a blackboard as Reginald Barclay looked on and offered suggestions. ()
In 2375, a chalk-drawn plan of Vic's lounge was used to plan the elimination of Frankie Eyes and his henchmen. ()
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Category:Communications technology
Category:Education