Keywords
20's, 20-25, 20-30, 20s, 25-29 years, 25-30, 30's, 30-34 years, 30-35, 30-40, 30s, 35-40, 60's, 60-65, 60-70, 60s, 65-70, 70's, 70-74 years, 70-75, 70-80, 70s, 75-80, accessory, adult, african, african american, african ethnicity, african-american, african-american ethnicity, afro american, afro-american, america, american, americas, authentic, authenticity, background people, beard, black, boston, candid, caribbean, caucasian, class, classroom, college, color, color image, colour, concentrating, concentration, copy space, east, east coast, education, elderly, electromagnetism, examining, experiment, experimentation, experimenting, eye-glasses, eyeglasses, facial hair, fellow, focus on foreground, focusing, furnishing, furniture, gentleman, glasses, guy, head & shoulders, head and shoulders, hearing impairment, horizontal, human, human being, indoor, indoors, information, inside, instructing, intelligence, knowledge, lab, laboratory, learning, male, man, massachusetts, mid adult, mid adult men, multi-ethnic group, negative space, new england, north america, northeast, of african descent, old, one, one person, people, performance, performer, performing, person, photography, pupil, r&d, real people, research, research & development, research and development, researching, retired, retirement, school, schoolroom, science, scientific, senior, senior adult, senior citizen, senior men, serious, seriousness, setting up, seventies, seventy, sixties, sixty, solemn, somber, specs, spectacles, spinal meningitis, stem education, student, studying, table, thirties, thirty, transit, transport, tuition, twenties, twenty, u.s, u.s.a, united states, united states of america, university, us, usa, vehicle, western european, wheelchair, whisker, white space, wisdom, young adult, young men, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, bld175003