OCEAN is an acronym for successive personality traits, the so-called Big Five of Paul Costa and Robert McCrae, i.e. openness to experience, conscientiousness, extraversion, agreeableness and neuroticism. An alternative abbreviation is CANOE (canoe). This model began to be developed in the 1960s.
Historically, these traits can be compared to temperament traits. And so, the sanguine type is most closely related to emotional stability and extroversion. The phlegmatic type is also stable, but introverted. The choleric type is unstable and extroverted, and the melancholic type is unstable and introverted.