The Myers Briggs Type IndicatorŪ, or MBTIŪ, is based on the teachings of Carl Gustav Jung, and identifies four preferences of behaviour:
Combining these four preferences produces a personality type, such as ENFP or ISTJ. The model is useful for a wide range of applications, including: interpersonal skills development, self-awareness, career counselling, psychotherapy, team building and many other areas.
For more information, read 'Gifts Differing' by Isabel Briggs Myers or 'Navigating Mid-life' by Eleanor Corlett and Nancy Millner.
There are other pages on the World Wide Web that provide more information on Myers Briggs.