#  Subsystems

- Compilation and Building
    - [Compilation and Building Guide](subsys-build-all.md)
    - [Build System Coding Specifications and Best Practices](subsys-build-gn-coding-style-and-best-practice.md)
    - [Building the Kconfig Visual Configuration](subsys-build-gn-kconfig-visual-config-guide.md)
    - Related Operations
      - [Building a Product](subsys-build-product.md)
      - [Building a Subsystem](subsys-build-subsystem.md)
      - [Building a Component](subsys-build-component.md)
      - [Building a Module](subsys-build-module.md)
      - [Building a Chipset Solution](subsys-build-chip_solution.md)
      - [Configuring Features](subsys-build-feature.md)
      - [Configuring System Capabilities](subsys-build-syscap.md)
      - [Setting deps and external_deps](subsys-build-reference.md#deps-and-external_deps)
      - [Information Collected by the Open Source Software Notice](subsys-build-reference.md#information-collected-by-the-open-source-software-notice)
      - [Configuring Parameters for Accelerating Local Build](subsys-build-reference.md#parameters-for-accelerating-local-build)
      - [Viewing Ninja Build Information](subsys-build-reference.md#viewing-ninja-build-information)
      - [HAP Build Guide](subsys-build-gn-hap-compilation-guide.md)
      - [FAQs](subsys-build-FAQ.md)
- [Distributed Remote Startup](subsys-remote-start.md)
- Graphics
  - [Graphics Overview](subsys-graphics-overview.md)
  - [Container Component Development](subsys-graphics-container-guide.md)
  - [Development of Layout Container Components](subsys-graphics-layout-guide.md)
  - [Common Component Development](subsys-graphics-common-guide.md)
  - [Animator Development](subsys-graphics-animation-guide.md)
- Multimedia
  - Camera
    - [Camera Overview](subsys-multimedia-camera-overview.md)
    - [Photographing Development](subsys-multimedia-camera-photo-guide.md)
    - [Video Recording Development](subsys-multimedia-camera-record-guide.md)
    - [Previewing Development](subsys-multimedia-camera-preview-guide.md)
  - Audio/Video
    - [Audio/Video Overview](subsys-multimedia-video-overview.md)
    - [Audio/Video Playback Development](subsys-multimedia-video-play-guide.md)
    - [Audio/Video Recording Development](subsys-multimedia-video-record-guide.md)
- Utils
  - [Utils Overview](subsys-utils-overview.md)
  - [Utils Development](subsys-utils-guide.md)
  - [Utils FAQ](subsys-utils-faqs.md)
- [AI Framework Development](subsys-ai-aiframework-devguide.md)
- Data Management
  - RDB
    - [RDB Overview](subsys-data-relational-database-overview.md)
    - [RDB Development](subsys-data-relational-database-guide.md)
  - Lightweight Data Store
    - [Lightweight Data Store Overview](subsys-data-storage-overview.md)
    - [Lightweight Data Store Development](subsys-data-storage-guide.md)
- Sensor
  - [Sensor Overview](subsys-sensor-overview.md)
  - [Sensor Usage Guidelines](subsys-sensor-guide.md)
  - [Sensor Usage Example](subsys-sensor-demo.md)
- USB
  - [USB Overview](subsys-usbservice-overview.md)
  - [USB Usage Guidelines](subsys-usbservice-guide.md)
  - [USB Usage Example](subsys-usbservice-demo.md)
- Application Framework
  - [Application Framework Overview](subsys-application-framework-overview.md)
  - [Setting Up a Development Environment](subsys-application-framework-envbuild.md)
  - [Development Guidelines](subsys-application-framework-guide.md)
  - [Development Example](subsys-application-framework-demo.md)
- [OTA Update](subsys-ota-guide.md)
- Telephony
  - [Telephony Overview](subsys-tel-overview.md)
  - [Telephony Development](subsys-tel-guide.md)
- Security
  - [Security Overview](subsys-security-overview.md)
  - [Development on Application Signature Verification](subsys-security-sigverify.md)
  - [Development on Application Permission Management](subsys-security-rightmanagement.md)
  - [Development on IPC Authentication](subsys-security-communicationverify.md)
  - [Development on Device Security Level Management](subsys-security-devicesecuritylevel.md)
  - [Development on HUKS](subsys-security-huks-guide.md)
  - [Application Privilege Configuration Guide](subsys-app-privilege-config-guide.md)
  - [Preset Application Configuration Guide](subsys-preinstall-app-config-guide.md)
- Startup
  - [Startup](subsys-boot-overview.md)
  - init Module
      - [init Configuration File](subsys-boot-init-cfg.md)
      - [Job Management](subsys-boot-init-jobs.md)
      - [Service Management](subsys-boot-init-service.md)
      - [Parameter Management](subsys-boot-init-sysparam.md)
      - [Sandbox Management](subsys-boot-init-sandbox.md)
      - [Plug-in Management](subsys-boot-init-plugin.md)
  - [appspawn Module](subsys-boot-appspawn.md)
  - [bootstrap Module](subsys-boot-bootstrap.md)
  - [FAQs](subsys-boot-faqs.md)
  - [Reference](subsys-boot-ref.md)
- [Test Case Development](subsys-testguide-test.md)
- DFX
  - [DFX Overview](subsys-dfx-overview.md)
  - [HiLog Development](subsys-dfx-hilog-rich.md)
  - [HiLog\_Lite Development](subsys-dfx-hilog-lite.md)
  - [HiTraceChain Development](subsys-dfx-hitracechain.md)
  - [HiTraceMeter Development](subsys-dfx-hitracemeter.md)
  - [HiCollie Development](subsys-dfx-hicollie.md)
  - HiSysEvent Development
    - [HiSysEvent Logging Configuration](subsys-dfx-hisysevent-logging-config.md)
    - [HiSysEvent Logging](subsys-dfx-hisysevent-logging.md)
    - [HiSysEvent Listening](subsys-dfx-hisysevent-listening.md)
    - [HiSysEvent Query](subsys-dfx-hisysevent-query.md)
    - [HiSysEvent Tool Usage](subsys-dfx-hisysevent-tool.md)
  - [HiDumper Development](subsys-dfx-hidumper.md)
  - [HiChecker Development](subsys-dfx-hichecker.md)
  - [FaultLogger Development](subsys-dfx-faultlogger.md)
  - [Hiview Development](subsys-dfx-hiview.md)
- R&D Tools
  - [bytrace](subsys-toolchain-bytrace-guide.md)
  - [hdc\_std](subsys-toolchain-hdc-guide.md)
  - [hiperf](subsys-toolchain-hiperf.md)
- [XTS Test Case Development](subsys-xts-guide.md)