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diff --git a/docs/document/Powershell/docs/Object Manipulation/Object Members.md b/docs/document/PowerShell/docs/Object Manipulation/Object Members.md
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diff --git a/docs/document/Powershell/docs/Object Manipulation/Select.md b/docs/document/PowerShell/docs/Object Manipulation/Select.md
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index 6c09418f..586598d8 100644
--- a/docs/document/Powershell/docs/Object Manipulation/Select.md	
+++ b/docs/document/PowerShell/docs/Object Manipulation/Select.md	
@@ -1,7 +1,14 @@
 # Select
 
-`Select-Object` is a combination of `Select`, `Take`, `TakeLast` in dotnet LINQ.
-It can be appiled on singular object and any collection.
+## Overview
+
+- Picking composed object by one or more properties with `-Property`.
+    - select properties reversely by `-ExcludeProperty`.
+- Picking single property value with `-ExpandProperty`.
+- Take a count from start or end with `-First` or `-Last`.
+- Skip a count from start or end `-Skip` or `-SkipLast`.
+- Cherry-Pick one or more items by zero-based index.
+- Distinct items selected from pipline.
 
 > [!TIP]
 > Use `select` alias for `Select-Object`.
@@ -157,7 +164,7 @@ gps | select -SkipLast 5
 ## Cherry Pick 
 
 ```ps1
-$dir = ls -Directory
+$dir = gci -Directory
 $dir | select -Index 1, ($dir.Length - 1) # Pick first and last item
 ```
 
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diff --git a/docs/document/Powershell/docs/Type System/Type Casting & Checking.md b/docs/document/PowerShell/docs/Type System/Type Casting & Checking.md
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diff --git a/docs/services/DocumentService.ts b/docs/services/DocumentService.ts
index ecb5e3e4..8ab5f204 100644
--- a/docs/services/DocumentService.ts
+++ b/docs/services/DocumentService.ts
@@ -28,7 +28,7 @@ export const documentMap = {
   Nix: { icon: '❄', description: 'Reproduce freedom' },
   'Entity Framework Core': { icon: '🗿', description: '' },
   'HTML & CSS': { icon: '😬', description: '' },
-  Powershell: { icon: '🐚', description: '...' },
+  PowerShell: { icon: '🐚', description: 'The first strongly-typed shell! Not bad.' },
 } as const satisfies DocumentInfo;
 
 export type DocumentName = keyof typeof documentMap;