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"T.N.T." was AC/DC's second studio album, released in December 1975, and produced by Harry Vanda and George Young. It featured the hit single "It's a Long Way to the Top (If You Wanna Rock'n' Roll)" and also included "High Voltage," "TNT," and "Rock'n' Roll Singer," showcasing the band's signature hard rock sound and establishing them as a force in the music industry.