SVI

SVI may refer to:


 * Settleability Volume Index or sludge volume index (SVI): the volume in millimeters occupied by 1 g of activated sludge after aerated liquid has settled for 30 minutes
 * Siddhartha Vanasthali Institute, a school in Nepal
 * Southern Railway of Vancouver Island
 * Spectravideo, computer and video-game manufacturer
 * Strayer Voigt Inc, manufacturer of M1911-styled modular pistols
 * Sviatoslav Mykhailiuk, Ukrainian basketball player nicknamed "Svi"
 * Switch virtual interface, a logical layer-3 interface in a LAN environment
 * System Volume Information (in Microsoft Windows file-systems)
 * Sequential vapor infiltration, a synonym for sequential infiltration synthesis