2, 20-25, 20-30, 20's, 20s, 25-30, 40-45, 40-50, 40's, 40s, 45-50, 50-55, 50-60, 55-60, adult, associate, clip board, clip-board, collaborating, colleague, color, colour, communicating, computer, conferring, connecting, connexion, consultation, daylight, daytime, discussion, displaying, doc, e-book, e-reader, electronic book, electronic reader, exhibiting, expert, fellow, fifties, fifty, forties, forty, general practitioner, gentleman, guy, health, health-care, healthcare professional, healthcare worker, human, human being, indoor, inside, joining, male, md, medic, medical care, medical science, mid life, middle age, middle aged, middle-age, middle-aged, negative space, operating, person, physician, responsible, speaking, tablet, tablet computer, talking, team, together, toiling, twenties, twenty, two, waist-up, white coat, white space, wireless, work, world wide web,
