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 New Adventures, a series of novels by Virgin Publishing based on the British television series Doctor Who 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
See also Vnà, a village in the Lower Engadine, Graubünden, Switzerland