Coal India Limited is India's largest coal mining company. It has over 4 lakh employees and operates through 8 subsidiaries. Coal India provides extensive training through its 26 technical and management training institutes. The largest is the Indian Institute of Coal Management, which conducts residential programs. Coal India also has 102 vocational training centers that provide work-related training. Management training is provided through each subsidiary's management training center. Technical training includes basic, refresher, and specialized courses depending on technology changes. Trainees must serve 50 months after 1-year programs or forfeit their security deposit.