Id, Ego & Superego: These are three parts of the psychic apparatus defined by Freud which describes different aspects of personality; Id being primal desires, Ego being realistic/practical aspect and Superego being moral conscience.
Oedipus Complex/Electra Complex: These are controversial theories proposed by Freud suggesting that during certain stages of childhood development children have subconscious sexual attachments towards their opposite-sex parent while viewing same-sex parent as a rival.
Psychosexual Stages:According to Freud these are five stages (Oral, Anal, Phallic, Latency and Genital) of childhood development each characterized by sexual pleasure in different parts of the body.