Documented background jobs module.

docs/en/Modules/Audit-Logging.md

@@ -53,4 +53,8 @@ This module uses `AbpAuditLogging` for the connection string name. If you don't
 
 ##### Collections
 
-- **AbpAuditLogs**
+- **AbpAuditLogs**
+
+## See Also
+
+* [Audit logging system](../Audit-Logging.md)

docs/en/Modules/Background-Jobs.md

@@ -1,3 +1,55 @@
 # Background Jobs Module
 
-TODO
+The Background Jobs module implements the `IBackgroundJobStore` interface and makes possible to use the default background job manager of the ABP Framework. If you don't want to use this module, then you should implement the `IBackgroundJobStore` interface yourself.
+
+> This document covers only the background jobs module which persists background jobs to a database. See [the background jobs](../Background-Jobs.md) document for more about the background jobs system.
+
+## How to Install
+
+This module comes as pre-installed (as NuGet/NPM packages) when you [create a new solution](https://abp.io/get-started) with the ABP Framework. You can continue to use it as package and get updates easily, or you can include its source code into your solution (see `get-source` [CLI](../CLI.md) command) to develop your custom module.
+
+### The Source Code
+
+The source code of this module can be accessed [here](https://github.com/abpframework/abp/tree/dev/modules/background-jobs). The source code is licensed with [MIT](https://choosealicense.com/licenses/mit/), so you can freely use and customize it.
+
+## Internals
+
+### Domain Layer
+
+#### Aggregates
+
+- `BackgroundJobRecord` (aggregate root): Represents a background job record.
+
+#### Repositories
+
+Following custom repositories are defined for this module:
+
+- `IBackgroundJobRepository`
+
+### Database providers
+
+#### Common
+
+##### Table / collection prefix & schema
+
+All tables/collections use the `Abp` prefix by default. Set static properties on the `BackgroundJobsDbProperties` class if you need to change the table prefix or set a schema name (if supported by your database provider).
+
+##### Connection string
+
+This module uses `AbpBackgroundJobs` for the connection string name. If you don't define a connection string with this name, it fallbacks to the `Default` connection string. See the [connection strings](https://docs.abp.io/en/abp/latest/Connection-Strings) documentation for details.
+
+#### Entity Framework Core
+
+##### Tables
+
+- **AbpBackgroundJobs**
+
+#### MongoDB
+
+##### Collections
+
+- **AbpBackgroundJobs**
+
+## See Also
+
+* [Background job system](../Background-Jobs.md)