# Observability Observability is the ability to understand what a system is doing from its external signals. ## Start Here - [[Field Notes/Incident Review]] - [[Field Notes/Runbook]] - [[Field Notes/SLO]] - [[Field Notes/Tail Latency]] ## Projects - [[Projects/Uptime Monitor]] - [[Projects/SRE Terminal Debugger]] ## Related Topics - [[Topics/Production Engineering]] - [[Topics/Distributed Systems]]