History of the Encyclopædia Britannica

The Encyclopædia Britannica has been published continuously since 1768, appearing in fifteen official editions. Several editions were amended with multi-volume "supplements" (3rd, 4th/5th/6th), several consisted of previous editions with added supplements (10th, 12th, 13th), and one represented a drastic re-organization (15th). In recent years, digital versions of the Britannica have been developed, both online and on optical media. Since the early 1930s, the Britannica has developed "spin-off" products to leverage its reputation as a reliable reference work and educational tool.

Print editions were ended in 2012, but the Britannica continues as an online encyclopedia on the internet.

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