Any observable occurrence in an information system.
Something that occurs within a system or network.
See NIST SP 800-92 under Event for more information.
Any observable occurrence on a manufacturing system. Events can include cybersecurity changes that may have an impact on manufacturing operations (including mission, capabilities, or reputation).
See NISTIR 8183 under Event (Framework for Improving Critical Infrastructure Cybersecurity, version 1.0) for more information.