Complex sentence: After graduating from the Madras Institute of Technology in 1960, Kalam joined the Aeronautical Development Establishment of the Defence Research and Development Organisation (DRDO) as a scientist after becoming a member of the Defence Research & Development Service (DRDS).
Split into simpler sentences: After graduating from the Madras Institute of Technology in 1960, Kalam joined the Aeronautical Development Establishment of the Defence Research and Development Organisation (DRDO) as a scientist. He became a member of the Defence Research & Development Service (DRDS).