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Avenir Next was designed by Adrian Frutiger and Akira Kobayashi, and released by Linotype Library in 2004. The type family is a complete revision of Frutiger's Avenir (1988), and is part of Linotype Library's Platinum Collection.
Adrian Frutiger designed the original Avenir for Linotype in 1988. It is based on an amalgamation of Futura and Erbar. Frutiger had never been happy with the cold, modern appearance of Futura, so he "humanized" it.
Avenir Next has a better distribution of weight across the family than Avenir did. The fonts also have small caps and old style figures in them. Each weight also has a condensed variant. No true italic styles were made though, just oblique ones. This seems in keeping with most of Frutiger's other typefaces.