Addition of some other links

https://www-secure.symantec.com/connect/downloads/block-access-extension-mp3-mp4-mpg-mpeg-flv

https://www-secure.symantec.com/connect/downloads/disable-cddvd-writer-system-through-symantec-endpoint-protection-manager

https://www-secure.symantec.com/connect/downloads/sep-policy-block-usb-and-exclude-keyboard-and-mouse

https://www-secure.symantec.com/connect/downloads/data-card-policy

HI Ajay,

Check this thread Lot of URL are available

https://www-secure.symantec.com/connect/forums/application-blocking-policy

Best Practices for Deploying Symantec Endpoint Protection's Application and Device Control Policies

http://www.symantec.com/business/support/index?page=content&id=TECH181679

Hi,

Check this video & it's appliacable in SEP 12.1 as well.

How to use device control feature in SEP 11.x. 

http://www.symantec.com/connect/videos/how-use-dev...

Hello,

I would suggest you these Articles below:

How to Block or Allow Devices in Symantec Endpoint Protection 

http://www.symantec.com/docs/TECH175220

WhitePaper on Application and Device Control:

http://www.symantec.com/avcenter/security/ADC/Configuring_Application_Control_1.1.pdf

Using Application and Device Control in Symantec Endpoint Protection (SEP) to block activity in common loading points for threats

http://www.symantec.com/docs/TECH96766

Symantec Endpoint Protection Application and Device Control

http://www.symantec.com/security_response/securityupdates/list.jsp?fid=adc

Symantec Endpoint Protection Manager 12.1 - Application and Device Control (ADC) - Policies explained

http://www.symantec.com/docs/TECH188597

Hope that helps!!