Grey Systems: Theory and Application is devoted to the international advancement of the theory and application of grey systems. It seeks to foster professional exchanges between scientists and practitioners who are interested in the foundations and applications of grey systems. Through the pioneering work on grey systems completed during the past years, grey systems theory has become an important ingredient in the development of information processing. Grey systems-based techniques are powerful tools in addressing those systems in which information is partially known and partially unknown. The theory of grey systems now encompasses a rich corpus including grey programming, system analysis, grey generating, grey modelling, grey prediction,grey decision-making, and grey control. Articles that appear in the journal will contain theory and applications of grey systems as well as various contributions of hybrid approaches combining grey systems with other theories for tackling uncertain information more effectively and efficiently.