You've heard the phrase "Birds of a feather flock together." John Holland created the Self-Directed Search (SDS), a career interest inventory based on this idea. He linked career interests with personality interests, finding that people are more successful and happy in careers where they can be around people most like them and in environments that most accommodate their personality types. Holland claimed that there are six categories of personality, which include Realistic, Investigative, Social, Enterprising, and Conventional. What is the sixth category?

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