Aditi System Technology : 9934040456 , 9308822177 : Contact : Kanchan Bhawan, Arrah Ho, Arrah - 802301
Chip Computer : 8603368076 , 9334249398 : Contact : 1st Floor, Kamta Complex, Near Nawada Chowk, Mill Road, Arrah Chowk, Arrah - 802301