Smart Historian is a data management software that collects real-time data from industrial devices like PLCs and SCADA systems via OPC. It stores the data in a MySQL database and generates customizable reports. The software can run on the same PC as the SCADA system or on a dedicated historian PC. It supports redundant configurations to switch to a backup OPC server if the primary connection fails. Reports can be viewed and triggered from any networked PC using a web browser.