Title<unk>  is the portion of the Code of Federal Regulations that governs food and drugs within the United States for the Food and Drug Administration (FDA), the Drug Enforcement Administration (DEA), and the Office of National Drug Control Policy (ONDCP).
It is divided into three chapters:
Chapter I — Food and Drug Administration
Chapter II — Drug Enforcement Administration
Chapter III — Office of National Drug Control Policy
21 CFR
Allan variance
Absolute deviation
Ancillary statistic
Hund's rule of maximum multiplicity
Hy's law
Hazard ratio
68W