The term ABM PART OF is composed of two crossword solutions: ANTI (4 letters) and SALT (4 letters). The acronym ABM stands for ANTI-Ballistic Missile, which is a type of missile defense system designed to intercept and destroy incoming ballistic missiles. The term 'PART OF' indicates that the two solutions are related to this system. ANTI refers to the fact that the system is designed to counter or prevent an attack, while SALT stands for Strategic Arms Limitation Talks, which were a series of negotiations between the United States and the Soviet Union during the Cold War to limit the number of nuclear weapons each country had.