What is the difference between UAT Testing and System Testing?

It never ceases to amaze me how many people mistake UAT Testing and System Testing. CV: Gregor has been providing ITSM Best Practices, Latest Solutions, Development, Consulting, Architecture, and Design since 1996, that's 27+ years, 100+ ITSM implementations, worldwide, in the UK, Europe, Australia, South Korea, Singapore, Canada, USA with products such as but not limited to Ivanti Neurons, Ivanti Service Manager, Saleslogix CRM, HEAT ITSM. Plus some ServiceNow, Remedy, and SageCRM experience. DISCLAIMER: Not endorsed by, affiliated with, or sponsored by Ivanti, ServiceNow, Remedy, Infor, or Sage. Any use of the software product names is descriptive of product experience/skillset or used to review the ITSM and CRM products.