Observer

• Microsoft

  • Microsoft Learn
    • .NET documentation
      • .NET API browser
        • System Namespace
          • IObserver Interface

• Angular

  • Angular docs
    • Observables compared to other techniques

• Embarcadero Cross-Platform App Development Software

  • Embarcadero/IDERA Documentation Wiki
    • RAD Studio API Documentation
      • System
        • System.Classes
          • System.Classes.IObserver