This teaching material on interdisciplinarity in technology and social change contains several entries in alphabetical order. We start this manual on interdisciplinarity with a zero to open up for a critical approach to classifications, scientific practice, technology, and knowing. At the library, books on interdisciplinarity are cataloged as 000. If written out, the number is spelled with a z and put last in the English alphabet. The zero revolutionized counting and mathematical studies, and the binary of 0 and 1 is a fundamental aspect of our data-driven and extensively interconnected lives. The 0 can be used as a binary to 1 in mathematical theory and as a measurement. At absolute zero temperature, all atoms are still as ontological transformations can be “rendered through heating and cooling” (Boyer 2018: 227), similar to disciplining and undisciplining processes.The organization of the material in this booklet on interdisciplinarity draws inspiration from various sources. One such source is the innovative novel Hopscotch by the Argentine author Julio Cortázar. Cortázar encourages the reader to be active and decide which chapters to start with, allowing for potentially disordered reading. Similarly, the entries in this dictionary can be read in any order, with each order potentially offering a new meaning to the content and ideas expressed here. The Department of Thematic Studies (TEMA) at Linköping University is well-known for its interdisciplinary research and training. The department was established in 1980, with Tema Technology and Social Change (TEMA T) being one of its first thematic units. The activities at the unit are not only focused on PhD training; the staff are also involved in teaching, research, and national and international collaborations. While this text covers many aspects of interdisciplinarity in the department, it should not be seen as comprehensive.