SPB Engineers (India)
LG-009 & 060, V. I. P. Market, P-187 Scheme VI-M, C. I. T. Road
Kolkata- 700054, West Bengal (India)
Micro Tech Industries
No. 14A/1 G, Ultadanga Road, Gopal Bhavan
Kolkata- 700004, West Bengal (India)
Cdac- Tvm
Cig, Cdac, Vellayambalam
Nabadwip- 695033, West Bengal (India)
A. B. Systems
35 A, Moore Avenue, #2 D,Falfuhni Appartment, Regent Park, Near Jyoti Cinema
Kolkata- 700040, West Bengal (India)