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