Ключевые слова: abstract, administration, arrow, black, blackboard, blank, board, box, business, chalk, chalkboard, chart, classroom, college, communication, concept, connection, copy, detail, development, diagram, education, empty, flow, frame, hand, high, management, map, mind, network, organization, pattern, plan, presentation, rectangle, rectangular, schema, scheme, school, shape, sketching, space, strategy, tactic, texture, tree, white, write,