Add ops to nos

README.md

@@ -3,7 +3,7 @@
 A awesome list about Software Defined Network (SDN) 
 
 - [Awesome SDN](#awesome-sdn)
-  - [Operating System](#operating-system)
+  - [Network Operating System](#network-operating-system)
   - [Install Enviroment](#install-enviroment)
   - [Software Switch](#software-switch)
   - [Network Virtualization](#network-virtualization)
@@ -14,9 +14,10 @@ A awesome list about Software Defined Network (SDN)
   - [Library](#Library)
   - [Test](#Test)
 
-# Operating System
+# Network Operating System
 - [PicOS](http://www.pica8.com/products/picos) - A SDN OS for white box switches Layer-2/3 feature set with support for OpenFlow, OVSDB, and other protocols.
 - [OpenNetworkLinux](https://opennetlinux.org) - A Linux distribution for "bare metal" switches, that is, network forwarding devices built from commodity components.
+- [OpenSwitch](http://www.openswitch.net) - A linux network oerating system from Hewlett-Packard.
 
 # Install Enviroment
 - [ONIE](http://onie.org/) - ONIE enables a bare metal network switch ecosystem where end users have a choice among different network operating systems.