Ключевые слова: biotechnology, blackboard, blank, board, chalk, chalkboard, chemistry, class, competence, design, draw, drawn, education, employment, equipment, experience, experiment, handwriting, healthcare, image, inventor, isolated, job, laboratory, lesson, line, lineart, lithography, microscope, old, oldfashioned, person, physics, profession, professionalism, qualification, research, responsibility, retro, school, scientist, sketch, skills, specialty, technology, test, texture, white, write,