ISO/IEC TR 29106:2007+A1:2012+A2:2019 acts as an introduction to the concepts used to develop the MICE environmental classification system used in cabling standards developed by ISO/IEC. It also gives the sources used to define the boundaries of MICE classifications. THIS CONSOLIDATED VERSION CONSISTS OF THE FIRST EDITION (2007), ITS AMENDMENT 1 (2012) AND ITS AMENDMENT 2 (2019). THEREFORE, NO NEED TO ORDER AMENDMENT IN ADDITION TO THIS PUBLICATION.