diff --git a/system-overview/README.md b/system-overview/README.md
index 00ebc2b..83fc8a3 100644
--- a/system-overview/README.md
+++ b/system-overview/README.md
@@ -77,6 +77,48 @@ coverY: 0
* RTP164 High Performance Oscilloscope
+## Primary Usage Notes
+
+### General Interactive Login Use
+
+### Graphical Login use via ThinLinc
+
+- `login` — not for heavy jobs.
+- `zenith`
+- `clark`
+- `lewis`
+- `pcie`
+- `intrepid`
+
+### Slurm for Large Jobs
+
+- Triple Crown — Dedicated Slurm runners.
+ - `affirmed`
+ - `justify`
+ - `secretariat`
+ - `pharaoh`
+- Others — Shared with interactive use.
+ - `milan[0-3]`
+ - `cousteau`
+ - `excl-us03`
+ - `explorer`
+ - `oswald`
+ - `oswald[00, 02-03]`
+
+### Gitlab Runner
+
+### Docker
+
+- `docker`
+
+### Specialized Use
+
+- `dragon` — Siemens EDA Tools.
+
+### Project-based Use
+
+- `lewis` — RISC-V emulation using U250.
+
## Infrastructure Systems
| Host Name | Description | OS |
@@ -88,3 +130,32 @@ coverY: 0
| quad00 | Intel 20 Core 96 GB utility server | Centos 7.9 |
| quad01 | Intel 20 Core 96 GB utility server | Centos 7.9 |
| quad02 | Intel 20 Core 96 GB utility server | Centos 7.9 |
+
+# Test
+
+{% raw %}
+
+
+
+
+
+
+
+# ExCL
+
+## Systems
+
+## Services
+
+## Quickstart
+
+
+
+
+
+{% endraw %}