This is the second volume of a series of edited books whose aim is to collect contributed papers in a frame that can be a sort of dictionary of personalities in MMS (Mechanism and Machine Science). The papers will illustrate personalities by recognizing persons and their activity, by looking mainly at technical developments in the historical evolution of the fields that today are grouped in MMS. Thus, emphasis will be addressed also to biographical notes to describe efforts and experiences of people who have contributed to the technical achievements whose survey is the core of each contributed paper. It is a unique perspective for technical experts to go further in-depth into the historical background of their topics of expertise. This second volume of the dictionary project has been possible thanks to the invited authors who have enthusiastically shared the initiative and prepared the papers with joint characteristics of survey and historical notes. These papers cover the wide field of the History of Mechanical Engineering with specific focus on MMS. Readers can benefit from the papers in this book and future ones with further satisfaction and motivation for her or his own work (historical or not).