In order to fulfill the demand of stabilizing voltage automatically, replace the sur-volter, Mr. Nguyen Chi Linh successfully developed the first Automatic Voltage Stabilizers, a substitution to manual voltage regulators in Vietnam, The AVS made by Mr. Linh was accepted rapidly by the market. Nhatlinh Co., Ltd, therefore founded to manufacture LiOA brand AVS. LiOA is the short- cut of Linh – Stabilizer in Vietnamese “On ap”. Since then, Vietnamese uses the word LiOA to indicate an AVS.