VNS

VNS is an initialism for:

Telecommunications

 * Victim Notification System, an automated system that notifies a victim that the perpetrator of a crime that affected them has been released
 * Virtual Network Switching, a technique in telecommunications used to reduce or eliminate the number of data segments used in a command
 * Virtual Network System, a network that connects all virtual machines and devices regardless of location
 * Visual Navigation System
 * Voice Network Switching

Science

 * Vagus nerve stimulation, a medical treatment used for certain types of epilepsy
 * Vicarious nucleophilic substitution, a special type of nucleophilic aromatic substitution
 * Visiting Nurse Service, an in-home medical care service

Other

 * Valley New School, a charter school in Appleton, Wisconsin, USA
 * Varanasi, a city in northern India
 * The IATA code of Lal Bahadur Shastri Airport, Varanasi, India
 * Variable Neighborhood Search
 * Viet Nam News, English-language newspaper in Vietnam
 * Viqarunnisa Noon School, an all-girls higher secondary school in Dhaka, Bangladesh
 * Visual Nature Studio, a Microsoft Windows program used to create photorealistic images
 * Government of National Salvation (Vlada narodnog spasa), the colloquial name for the collaborationist puppet government in Serbia between 1941-1944
 * Vlach National Party (Vlaška narodna stranka), a political party in Serbia
 * VNS Matrix, Australian artist collective
 * Voter News Service, a defunct American exit poll consortium