Findings:

• C/C++ headers
• headers
• header (user)
• Writeup Header Revision (collaboration)
• Cache-Control Headers
• HTTP Headers
• HTML heading tags
• IP Header Option
• news headers
• mail headers
• Content-length header
• Double-Header
• Header
• MPEG Audio Frame Header
• header file
• Headers and Volleys
• How to decode email headers
• case headers
• Header Checksum
• Header Length
• IP Packet Header

If you Log in you could create a "NSRT header" node. If you don't already have an account, you can register here.