Web Notifications are part of W3C standard and defines an API for end-user notifications. The scrolling notifications and audible alerts require no user action. Organisers can communicate with participants through the use of alerts, notifications, and push messages. Allows configuring email notifications for build results. Icinga 2 manages monitoring tasks, running checks, sending alert notifications. Recently, there are also observations of mobile phone spam delivered via browser push notifications. Services include user management, push notifications, integration with social networking services and more. Users are directed to the settings menu to change the volume of notifications. Furthermore, users can configure their own notifications themselves. Additional features include file and folder sharing, notifications, screen capture, and selective syncing. Benefits include free checked bags and email notifications about fare sales and discounts. The Taskbar introduces support for balloon notifications which can also be used by application developers. In various software systems, kanban is used for signalling demand to suppliers through email notifications. A capability to support subscribing and receiving asynchronous event notifications is published in RFC 5277. It also improves reliability by means of failure monitoring and system health data notifications.