VNA

VNA may refer to:

Medicine

 * Vagal nerve activity, activity of the vagus nerve which connects the brain to the heart
 * Ventral anterior nucleus, a nucleus of the thalamus
 * Vertebral nerve activity, activity of the vertebral nerve, a nerve near the backbone and neck in vertebrates
 * Virus-neutralizing antibody, antibodies that are specialized to bind to viral components such as viral glycoproteins.
 * Vendor Neutral Archive, an archive for medical image storage that is independent of the picture archiving and communication system (PACS) that utilizes those images

Science and technology

 * Value network analysis, a methodology for handling value networks
 * Vanillylamide of n-nonanoic acid, another name for the capsaicinoid nonivamide
 * Vector network analyzer, an instrument for electrical circuits analysis, measuring both amplitude and phase properties
 * Very narrow aisle, a common abbreviation for a type of forklift truck used in warehousing
 * von Neumann architecture, a design model for a stored-program digital computer, utilized by virtually all modern computers

Miscellaneous

 * Vietnam news agency, the official news agency of Vietnam
 * Vietnamese National Army (1949–1955), the loyalist army in the First Indochina War
 * Virgin Nigeria Airways, the former name of Nigerian Eagle Airlines, the national flag carrier of Nigeria
 * Visiting Nurse Association, a type of home healthcare organization

Air transport codes

 * The IATA airport designator of Saravane Airport, Salavan Province, Laos
 * The ICAO airline designator of Empresa Aviación Interamericana, Uruguay