This approach has a long history of reliable operation as probe contacts, but in sockets and contactors there are some mechanical weak spots that prevent it’s broad acceptance. The final contact technology that is in production, is the coaxial Kelvin Pin. These are essentially one pin which is insulated from and surrounded by a spring loaded sleeve. This is the best approach for testing WLCSP devices at 0.4mm pitch. The advantage of this pin is the increased accuracy and the ability to use flat tipped probes which in some applications might be a more stable tip contact. The published data indicates they are in the same reliability numbers, ie >100k insertions while maintaining very stable resistance. Liberty Research uses pins from Signal Integrity in sockets to test devices at 0.5mm pitch QFN/LGA/SOP devices and larger and we use our Coaxial Kelvin for 0.5mm pitch WLCSP and smaller pitches. Coaxial Kelvin for fine pitch BGA and WLCSP devices Pin Dimensions In this work, which is based on the vision of the library as a primarily social entity and where the architecture of the building has a direct influence on information services, it is proposed the development of library buildings focused on people and the New literacy. It is established that the only way libraries will fulfill their mission in the face of the challenges of the Information and Knowledge Society will be to the extent that they position themselves as entities of digital inclusion, integrate and adapt the new technologies of the Information and communication, respond effectively to their environment, adapt to social changes, practice constructivism and focus on the particular needs and interests of people. Among the many thoughts that the American anthropologist Margaret Mead (1901-1978) bequeathed to us, the product of her research and her writings, we quote in this presentation which seems to us very successful to describe what we would like to achieve by giving ourselves to the task To publish this Access number. The eloquent anthropologist once said: “Never doubt that a small, group of thoughtful, committed citizens can change the world. Indeed it is the only thing that ever has.” The development of human societies is plagued by examples that support this statement and we are sure that the formulation of it responds to the experiences that this tireless researcher and writer had in studying different cultures in different parts of the world. What results would we want from the readers to bring to their attention this thought of Margaret Mead? We wish that this small group of librarians who have agreed to translate their ideas and experiences into the articles we include in this volume will change the world of librarianship and therefore of the library profession and those librarians who examine with an analytical sense the Items included. Recognizing that a single article on a topic is not sufficient to change a discipline that in recent decades has evolved in complexity, we are satisfied that this analysis is The beginning of change. For that purpose we present the articles listed below and described below. In the summary of the first article of the author of Ada Myriam Felicié Soto entitled, Reflection on the paradigm shift in the use of space in libraries: ten lines of action, the author states that her work is based on the vision of Library as a primarily social entity in which the architecture of the building exerts a direct influence on the information services.