Which series of the PQS book covers fundamental knowledge and vocabulary?

The 100 series of the PQS book is dedicated to covering fundamental knowledge and vocabulary essential for foundational understanding in the engineering field. This series typically includes basic concepts, terminologies, and the core principles necessary for further studies in more advanced areas. By focusing on the essential building blocks of knowledge, it helps learners establish a solid foundation for technical subjects, making it an important starting point for anyone entering the field of engineering. Other series address more specialized topics or advanced concepts, which might not be appropriate for those just beginning their education in this discipline.