Skip to main content
U.S. flag

An official website of the United States government

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.

Skip to main content
National Library of Medicine logo

Classification 2025 Summer Edition

Worldwide source of medical classification resources

Class Index

non-alpha A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

General medical use
General physiological effects
Diagnostic use
Therapeutic use
See also names of specific forms of nonionizing radiation
Used for special purposes, by subject
Radio Waves   QC 676 - QC 678.6
General physiological effects
See also names of other types of pollutants
Radioactivity   QC 794.95 - QC 795.3