They use different names for the four types, but they are all based on the same information. For example, Performax Systems International Inc., analyzes whether a person's behavioral tendency is Influence, Dominance, Compliance or Steadiness. The Merrill-Reid Social Styles use the terms Expressive, Driving, Analytical and Amiable. They are Otter, Lion, Beaver and Golden Retriever. Some systems have even developed humorous versions, such as Herbo-Psychiatrists' Pepper, Garlic, Ginger and Parsley, or Robert Bramson's Exploders, Sherman Tanks, Snipers and Indecisive Stallers.
Most people are a combination of two types.
Some can even be a combination of three. You may occasionally see aspects of each type in yourself, but think in terms of what best describes you the majority of the time. If you think all four fit you equally, that may indicate that you feel some confusion about your personality. I'll discuss the first two in this column and the third and fourth in the next column. The people-person is especially known for talkativeness.