1# Process Model (FA Model) 2 3 4The OpenHarmony process model is shown below. 5 6 7- All PageAbility, ServiceAbility, DataAbility, and FormAbility components of an application (with the same bundle name) run in an independent process, which is **Main process** in green in the figure. 8 9- WebView has an independent rendering process, which is **Render process** in yellow in the figure. 10 11 **Figure 1** Process model 12 13  14 15 16OpenHarmony provides two inter-process communication (IPC) mechanisms. 17 18 19- [Common Events](common-event-fa.md): This mechanism is used in one-to-many communication scenarios. Multiple subscribers may receive events at the same time. 20 21- [Background Services](rpc.md): This mechanism is implemented through [ServiceAbility](serviceability-overview.md). 22 23
