The 16th European Networked Knowledge Organization Systems (NKOS) Workshop will take place at the DC-2016 conference in Copenhagen. Proposals are invited for the following: (a) Presentations (typically 20 minutes plus discussion time, potentially longer if warranted) on work related to the themes of the workshop (see below). An option for a short 5 minute project report presentation is also possible; and (b) Demos on work related to the themes of the workshop. The submission deadline is Friday, 1 July 2016 with notification of acceptance by Tuesday, 16th August 2016. The Call for Participation can be found on the conference website at http://bit.ly/nkos16 and on the NKOS website at https://at-web1.comp.glam.ac.uk/pages/research/hypermedia/nkos/nkos2016-dc/call-for-papers.html.