CPV code 38112100 designates Global navigation and positioning systems (GPS or equivalent) in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
38112100 is a leaf code — the most specific level of its branch — so it can be used directly as the main CPV code of a contract notice. If it does not quite fit, check the neighbouring codes under 38112000 (Sextants).