An ERD (Entity Relationship Diagram) is a graphical representation of the data in rest within a system (e.g. a business, an organization, an application) that is subject to analysis.
1. REFERENCE DOSE (RfD): DESCRIPTION AND USE IN HEALTH RISK ASSESSMENTS. 1.1. INTRODUCTION. This concept paper describes the U.S. Environmental Protection Agency's (U.S. EPA) principal approach to and rationale for assessing risk for health effects other than cancer and gene mutations from chronic chemical exposure.
RFID. a system consisting of a tag with an embedded electronic chip that emits a radio signal, and a scanning device for reading that signal: used for identification, tracking merchandise, assessing fees, etc. r (adio) f (requency) id (entification).