Waste is an inseparable point of our lives. It is an elementary byproduct of human functioning. Waste is divided into several groups, including medical, hazardous, municipal, biodegradable, industrial and inert waste. All waste should be handled differently. Both the producer of waste and its owner have many obligations that are imposed on them by appropriate standards and laws in force depending on the country. Waste should be classified and segregated. It should be strived to create a circular economy. Waste segregation and classification have many advantages including lower environmental pollution; improved living conditions for plants, animals, and people, as well as obtaining a better raw material for recycling through segregation. In this study, waste classification and separation systems are investigated. The waste separation methodology considers the origin, basic components, and physical, chemical, and biological properties of wastes. Manual, mechanical and optical systems were used for waste classification. Nowadays, smart waste classification and separation systems are being developed. There are many benefits to using them. These systems are automated - they separate and classify mixed waste. It is a very modern and efficient method that requires less work to function properly than the basic methods of classification and segregation of waste. It is also a much faster, more professional method, and one that prevents incorrect segregation of waste. It can be called a future-oriented way of handling waste and should be gradually introduced into our civilization. Examples of this technology include intelligent litter bins, vending machines for bottles, automated segregation, and sorting. Solving the waste problem is one of the issues that should receive special attention in the future. The constant development of technology related to this topic is a key element in the economy of our World.