"E" stands for Extroversion.
Extroversion is an attitude in which interest, value and meaning are attached primarily to external objects. Inner matters are habitually not valued or are difficult for the extrovert. Extroversion is the opposite of Introversion.
"N" stands for Intuition.
One of Jung's four psychic functions (Thinking, Feeling, Sensation, and Intuition). According to Jung, Intuition means that the internal and external world are perceived through the unconscious. Intuitive types focus on the future, with a view toward patterns & possibilities.
"T" stands for Thinking.
One of Jung's four psychic functions (Thinking, Feeling, Sensation, and Intuition). Thinking involves logical and rational thought processes. It is the ability to make evaluations and judgements based on logical categories and ideas. The Thinking function is the opposite of the Feeling function, which is the ability to make evaluations and judgements based on values.
"J" stands for Judging.
Judging is a way of making decisions based on various facts. Jung called it a "rational" function in the sense that it compares and contrasts various options. In the case of a Thinking-based Judgement, decisions are based upon the logic of a situation. In the case of a Feeling-based Judgement, decisions are based on the relative values in a situation. People with strong Judging tendencies tend to like for things to be planned and organized.