Introduction:
APJ Abdul Kalam, the former President of India, was a renowned scientist and a great leader. His father, Jainulabdeen, was an important influence on his life. In this response, we will discuss the kind of person Kalam's father was.

The Early Life of Jainulabdeen:
Jainulabdeen was born in Rameswaram, a small island town in Tamil Nadu, in 1888. He belonged to a family of boat owners who were involved in the trade between Rameswaram and Sri Lanka. Jainulabdeen was the youngest of his siblings, and he lost his father at a young age. Despite these difficulties, he was determined to pursue his education.

A Scholar and a Pious Man:
Jainulabdeen was a brilliant student and a scholar. He completed his education in Madras and became a teacher. He was also a deeply religious man and was known for his piety. He was a follower of the Ahmadiyya movement, a sect of Islam that emphasizes peace, tolerance, and education.

A Believer in Education:
Jainulabdeen believed that education was the key to success and worked hard to ensure that his children received a good education. He encouraged his son Abdul Kalam to pursue his studies and supported him throughout his life. Despite his own limited means, he made sure that his children had access to books and other educational resources.

A Man of Integrity:
Jainulabdeen was a man of integrity and honesty. He was known for his fairness and his commitment to justice. He instilled these values in his children and taught them to be honest and upright in their dealings with others.

The Legacy of Jainulabdeen:
Jainulabdeen's legacy lives on through his children and his grandchildren. His son Abdul Kalam became one of India's most respected scientists and leaders. Kalam often spoke about the influence his father had on his life and the values he had instilled in him.

Conclusion:
In conclusion, Jainulabdeen was a remarkable man who played an important role in shaping the life of his son Abdul Kalam. He was a scholar, a pious man, a believer in education, and a man of integrity. His legacy continues to inspire people around the world.