it is difficult to be adapted to the data except for the U.S. List of types R: Realistic (Doers) Holland defines the "Realistic Type" as a person who has “a preference for activities that entail the explicit, ordered, or systematic manipulation of objects, tools, machines, and animals…these behavioral tendencies lead in turn to the acquisition of manual, mechanical, agricultural, electrical, and technical competencies.” Sample majors and careers include: Agriculture Architect (with Artistic and Enterprising) Athletics Carpenter (with Conventional and Investigative) Culinary arts/Chef (with Artistic and Enterprising) Chemistry/Chemist (with Investigative and Conventional) Computer engineering/Computer science/Information technology/Computer programmer (with Investigative and Conventional) Dentist (with Investigative and Social) Engineer (with Investigative and Conventional) Fashion design (with Artistic and Enterprising) Firefighter (with Social and Enterprising) Graphic designer (with Artistic and Enterprising) Model (people) (with Artistic and Enterprising) Musician (with Artistic and Enterprising) Nurse (with Social, Conventional, and Investigative) Outdoor recreation Park Naturalist (with Social and Artistic) Personal trainer (with Enterprising and Social) Photographer (with Artistic and Enterprising) Physical therapy (with Social and Investigative) Driver Sports medicine/Wilderness medicine (with Social and Investigative) Surgeon (with Investigative and Social) Veterinarian (with Investigative and Social) Web developer (with Conventional, Artistic, and Investigative) Zoologists and Wildlife Biologists (with Investigative) I: Investigative (Thinkers) Holland defines the "Investigative Type" as a person who has "a preference for activities that entail the observational, symbolic, systematic and creative investigation of physical, biological, and cultural phenomena (in order to understand and control such phenomena)... these behavioral tendencies lead in turn to an acquisition of scientific and mathematical competencies." Sample majors and careers include: Actuary (with Conventional and Enterprising) Archivist/Librarian (with Social and Conventional) Biostatistics/Masters in Public Health (with Conventional) Carpenter (with Conventional and Realistic) CPA (Certified Public Accountant) (with Conventional and Enterprising) Chemistry/Chemist (with Realistic and Conventional) Community Health Workers/Masters in Public Health (with Social and Enterprising) Computer engineering/Computer science/Information technology/Computer programmer (with Realistic and Conventional) Counselor (with Social and Artistic) Dentist (with Realistic and Social) Dietitian/Nutritionist (with Social and Enterprising) Doctor (Medical school/Medical research) (with Social) Engineer (with Realistic and Conventional) Financial analyst (with Conventional and Enterprising) Epidemiology/Masters in Public Health (with Social) Lawyer (with Enterprising and Social) Nurse (with Realistic, Conventional, and Social) Paralegal (with Conventional and Enterprising) Pharmacist (with Social and Conventional), Physical therapy (with Social and Realistic) Physics Poets, Lyricists and Creative Writers (with Artistic) Professor/Research – PhD Psychology/Psychologist (with Social and Artistic); Art therapist/Dance therapy/Drama therapy/Music therapy/Narrative therapy/Culinary therapy