The International Organization for Standardization (ISO) Technical Committee (TC) 229 on nanotechnologies is preparing guidance on the format and content of voluntary labeling for manufactured nano-objects (MNO) and products, preparations, and mixtures containing MNOs. According to ISO, the guidance, ISO/TS 13830:2011, would also address the use of the term “nano” in product labeling. The European Committee for Standardization (CEN) was initially developing the guidance and, under CEN, the guidance would have included business-to-employee and business-to-business communications. During a June 2012 meeting, TC 229 decided to focus the guidance on consumer labeling, however. Other ISO guidance documents will address other kinds of business communications.