The Compact Disc (CD) was launched commercially in 1982 by Philips and Sony, introducing the first mass-market digital audio format. Heralded by science outlets like ABC Science as a revolutionary step forward, the format promised superior, noise-free sound quality that rapidly overtook analog vinyl records and cassette tapes. Credit: ABC Science | History In Pictures

Need a better understanding of lower back pain? Discover the basics of lumbar disc anatomy — how your spinal discs function, what causes disc bulges or herniation, and why proper posture matters. | Sports-health