Industry 4.0, also known as the "Fourth Industrial Revolution", "smart manufacturing", "industrial internet" or "Factory of the Future" is a trend and highly discussed topic nowadays. Therefore, this topic drew attention to research and practice and opened many doors to shed light on the future path of engineering approaches. Cyber-Physical Systems (CPSs) play an important role as one of the core components in the industry 4.0 approach, as they connect the physical objects in production systems to the virtual ones. Indeed, CPSs are the main sources in Industry 4.0 through which data can be transformed into information and consequently extracted as knowledge. To be able to derive the required knowledge from the transformed information, it is essential to excavate the concept of CPS and associate its characteristics by which the system is identified. However, the current literature lacks a systematic study which analyses the characteristics of CPSs and the relationships among them. And so forth, this study will focus on CPS meta-models and their characteristics. Formal Concept Analysis (FCA), as a clustering technique, will be used to investigate any hypothetical relationship among the characteristics.