Figure 4. .
Fifty-three ICNs categorized into seven functional domains. ICN numbers, labels, and domains are presented in Table 1.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.