| Call | Control.Eff.Concurrent |
| call | Control.Eff.Concurrent.Api.Client, Control.Eff.Concurrent |
| CallbackResult | Control.Eff.Concurrent.Api.Server, Control.Eff.Concurrent |
| callRegistered | Control.Eff.Concurrent.Api.Client, Control.Eff.Concurrent |
| cancelTimer | Control.Eff.Concurrent.Process.Timer |
| CapturedLogsWriter | Control.Eff.Log.Writer, Control.Eff.Log, Control.Eff.Concurrent |
| CaptureLogs | Control.Eff.Log.Writer, Control.Eff.Log, Control.Eff.Concurrent |
| Cast | Control.Eff.Concurrent |
| cast | Control.Eff.Concurrent.Api.Client, Control.Eff.Concurrent |
| castRegistered | Control.Eff.Concurrent.Api.Client, Control.Eff.Concurrent |
| catchError | Control.Eff.ExceptionExtra |
| censorLogs | Control.Eff.Log.Handler, Control.Eff.Log, Control.Eff.Concurrent |
| censorLogsM | Control.Eff.Log.Handler, Control.Eff.Log, Control.Eff.Concurrent |
| clockDaemon | Control.Eff.Log.Message, Control.Eff.Log, Control.Eff.Concurrent |
| clockDaemon2 | Control.Eff.Log.Message, Control.Eff.Log, Control.Eff.Concurrent |
| consoleLogWriter | Control.Eff.Log.Writer, Control.Eff.Log, Control.Eff.Concurrent |
| ConsProcess | Control.Eff.Concurrent.Process, Control.Eff.Concurrent |
| Crash | Control.Eff.Concurrent.Process, Control.Eff.Concurrent |
| criticalSeverity | Control.Eff.Log.Message, Control.Eff.Log, Control.Eff.Concurrent |