diff --git a/README.md b/README.md
index 20f6ac8..59ab7b6 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,7 @@ If you want to contribute, you are highly encouraged to do so. Please read the [
     - [Networking Tools](#networking-tools)
     - [TCP/IP](#tcpip)
     - [Wi-Fi](#wi-fi)
+- [Open](#open)
 - [Package Managers](#package-managers)
 - [Printing](#printing)
 - [Security](#security)
@@ -482,6 +483,32 @@ defaults read /Library/Preferences/SystemConfiguration/com.apple.airport.prefere
 security find-generic-password -ga "ROUTERNAME" | grep "password:"
 ```
 
+## Open
+
+#### Open a Url
+```bash
+open http://www.github.com
+```
+
+#### Open a file
+```bash
+open README.md
+```
+
+#### Open an application using -a
+```bash
+open -a "Google Chrome" http://www.github.com
+```
+
+#### Open a directory in Finder
+```bash
+open /path/to/directory
+```
+
+#### Open the current directory
+```bash
+open .
+```
 
 ## Package Managers