# SystemUI
- [Introduction](#section11660541593)
- [Architecture](#section125101832114213)
- [Directory Structure](#section161941989596)
- [Repositories Involved](#section1371113476307)
## Introduction
SystemUI is a system app preinstalled in OpenHarmony. It provides users with interactive UIs that display system-related information, including the system status, prompts, and notifications \(such as the system time and battery level\).
### Architecture
![](figures/en-us_image_0000001103686480.png)
## Directory Structure
```
/applications/standard/systemui
├── figures # Architecture figures
├── entry # Main entry module code
│ └── src
│ ├── main
│ ├── js # JavaScript code
│ ├── resources # Resource configuration files
│ └── config.json # Global configuration files
├── navigationBar # System navigation module code
│ └── src
│ ├── main
│ ├── js # JavaScript code
│ ├── resources # Resource configuration files
│ └── config.json # Global configuration files
├── signature # Certificate files
├── LICENSE # License files
```
## Repositories Involved
System apps
**applications\_systemui**