Judgment of the Court (Fourth Chamber) of 28 May 2020.#Informatikgesellschaft für Software-Entwicklung (ISE) mbH v Stadt Köln.#Request for a preliminary ruling from the Oberlandesgericht Düsseldorf.#Reference for a preliminary ruling – Public procurement – Directive 2014/24/EU – Article 2(1)(5) – Article 12(4) – Article 18(1) – Concept of ‘contract for pecuniary interest’ – Contract between two contracting authorities pursuing a common objective in the public interest – Transfer of software for the coordination of fire service operations – No financial consideration – Link with a cooperation agreement under which supplementary modules of that software are made mutually available free of charge – Principle of equal treatment – Prohibition on placing a private undertaking in a position of advantage vis-à-vis its competitors.#Case C-796/18.