1825-First issue of Postal Stamp in Sind.
1851-First Official Telegraph Line between Calcutta (Kolkata) and Diamond Habour (24-Prgs.) in Oct.
1853-First Indian Railway train from Boribunder (Mumbai) to Thane on 16th April.
1887-First Modern Steel Plant at Kulti; Victoria Terminus (VT) constructed in Bombay (Mumbai).
1897-98-First Hydro-electric Station set up at Darjeeling.
1911-First Air-mail in India and the world from Bambrauli to Naini (Allahabad) 6 miles.
1925-First Electric Train Service between Bombay (Mumbai) and Kurla.
1927-Wireless broadcasting by a private company at Bombay (Mumbai).
1956-First large-scale nuclear rector Apsara was put into operation on 4th August.
1984-First Metro Rail in Calcutta (Kolkata).