Binary systems refer to two systems or entities that are closely related or connected to each other. Some possible synonyms for binary systems include paired systems, dual systems, twofold systems, double systems, dualistic systems, dichotomous systems, bifurcated systems, and dyadic systems. These terms emphasize the notion of two distinct components that interact or function together in a coherent way. Binary systems are prevalent in many fields, from computer science to astronomy, from linguistics to philosophy. Understanding and exploring the properties of binary systems can offer insights into the structure and interdependence of complex phenomena in the natural and social world.