: It included terms from both the ISO 14644 series and the ISO 14698 series (biocontamination control).
: A PDF preview of the standard, including the table of contents and foreword. ISO 14644 Guide (Cleanroom Supplies Ltd) iso 146446 pdf
If you are writing a paper or studying the standard, here are the key technical changes introduced in the current version (2015) compared to the previous one: : It included terms from both the ISO