ACAS is an acronym in English of the Advisory, Conciliation and Arbitration Service (Servicio de Asesoramiento, conciliation and arbitration) is a public agency and non-governmental assessment of the British Crown. In Barcelona and Catalonia is the acronym for the Concordia anti-AIDS Association, ACAS. Aeronautics is the acronym of Airborne Collision Avoidance System (ACAS), which means in Spanish system (TCAS) traffic collision prevention. ACAS is also the acronym for the Central American Sociological Association. Plural of aca or aka. In language Quechua here, aka or jaca, means Guinea pig, curi, (in plural cuyes). In Peru is the name of village and district, which belongs to the Department of Ancash.