The Universal Logging System (ULS) is an open source solution for storing, logging, analysing, reporting and monitoring of nearly arbitrary numeric values, text expressions and large objects like files or images.

Users can navigate and inspect this data as tables or graphs by using a web browser. Displayed results can be strung together to form reports. Thresholds can be defined which induce the ULS to send notifications when violated. Data can be aggregated by numerous functions to hourly, daily, weekly or monthly figures, which can e.g. be kept for long term analysis.