The Horizon System is a digital platform used primarily in the UK for managing and processing postal services. Developed by Post Office Ltd, it helps streamline operations by tracking transactions, inventory, and customer interactions. The system aims to improve efficiency and accuracy in postal services. This technology has faced scrutiny due to allegations of errors leading to financial discrepancies for some postmasters. Legal actions and investigations have highlighted the challenges associated with the system, prompting discussions about accountability and the need for technological improvements in the postal sector.