1# Background Tasks Kit
2
3- ArkTS APIs
4  - [@ohos.reminderAgentManager (Reminder Agent Management)](js-apis-reminderAgentManager.md)
5  - [@ohos.resourceschedule.backgroundTaskManager (Background Task Management)](js-apis-resourceschedule-backgroundTaskManager.md)
6  - [@ohos.resourceschedule.workScheduler (Deferred Task Scheduling)](js-apis-resourceschedule-workScheduler.md)
7  - [@ohos.WorkSchedulerExtensionAbility (Deferred Task Scheduling Callbacks)](js-apis-WorkSchedulerExtensionAbility.md)
8  <!--Del-->
9  - [@ohos.reminderAgentManager (Reminder Agent Management) (System API)](js-apis-reminderAgentManager-sys.md)
10  - [@ohos.resourceschedule.backgroundTaskManager (Background Task Management) (System API)](js-apis-resourceschedule-backgroundTaskManager-sys.md)
11  - [@ohos.resourceschedule.deviceStandby (Device Standby) (System API)](js-apis-resourceschedule-deviceStandby-sys.md)
12  - [@ohos.resourceschedule.usageStatistics (Device Usage Statistics) (System API)](js-apis-resourceschedule-deviceUsageStatistics-sys.md)
13  <!--DelEnd-->
14  - application
15    - [WorkSchedulerExtensionContext](js-apis-inner-application-WorkSchedulerExtensionContext.md)
16    - [WorkSchedulerExtensionContext (System API)](js-apis-inner-application-WorkSchedulerExtensionContext-sys.md)
17  - APIs No Longer Maintained
18    - [@ohos.backgroundTaskManager (Background Task Management)](js-apis-backgroundTaskManager.md)
19    - [@ohos.bundleState (Device Usage Statistics)](js-apis-deviceUsageStatistics.md)
20    - [@ohos.reminderAgent (Reminder Agent)](js-apis-reminderAgent.md)
21    <!--Del-->
22    - [@ohos.backgroundTaskManager (Background Task Management) (System API)](js-apis-backgroundTaskManager-sys.md)
23    - [@ohos.bundleState (Device Usage Statistics) (System API)](js-apis-deviceUsageStatistics-sys.md)
24    <!--DelEnd-->
25- C APIs
26  - Modules
27    - [TransientTask](_transient_task.md)
28  - Header Files
29    - [transient_task_api.h](transient__task__api_8h.md)
30    - [transient_task_type.h](transient__task__type_8h.md)
31  - Structs
32    - [TransientTask_DelaySuspendInfo](_transient_task___delay_suspend_info.md)
33- Error Codes
34  - [backgroundTaskManager Error Codes](errorcode-backgroundTaskMgr.md)
35  - [DeviceUsageStatistics Error Codes](errorcode-DeviceUsageStatistics.md)
36  - [reminderAgentManager Error Codes](errorcode-reminderAgentManager.md)
37  - [workScheduler Error Codes](errorcode-workScheduler.md)
38