This IPS workshop is the continuation of a biennial series that has become an established international forum for gathering the community of scientists and engineers working in research and technology related to plasmas and their applications. IPS 2018 will cover all modern aspects of plasma spectroscopy connecting basic research with industrial applications. The main topics of the workshop include all types of spectroscopic methods such as laser absorption spectroscopy, frequency combs, FTIR, ATR, OES, LIF, CARS, etc., and their various applications for diagnostics of gas discharges of any kind, particularly spectroscopy of atmospheric pressure or liquid plasmas for plasma medicine and catalysis. IPS 2018 is a unique opportunity to bring together plasma physicists, physical chemists and engineers developing new spectroscopic tools, methodologies and techniques, all working on plasma science. The workshop website is at http://ips2018.chem.ox.ac.uk and the local organizing committee welcomes questions at email@example.com.