San Francisco (sans-serif typeface) and iOS 10 is a new variant named "SF Compact Rounded". It is used in the new contact placeholder icons introduced in the OSes. The "SF Serif" variant was showcased during the keynote at WWDC 2018 on June 4, 2018 when the all-new Apple Books app was introduced. This variant is exclusive to Apple Books in iOS 12 and macOS Mojave, is not mentioned in Apple's Typography design guidelines, and is not publicly downloadable like other variants of the San Francisco typeface. Since its introduction, San Francisco has gradually replaced most of Apple's other typefaces on their software and hardware
Grotesque (Stephenson Blake typefaces) artistically and systematically designed than later families like Univers and Helvetica, they were very commonly used in British commercial printing in the metal type era, with a revival of interest as part of a resurgence of use of such "industrial" sans-serifs around the 1950s. Writing in "The Typography of Press Advertisement" (1956), printer Kenneth Day commented that the family "has a personality sometimes lacking in the condensed forms of the contemporary sans cuttings of the last thirty years." Jeremy Tankard has described them as the "most idiosyncratic of designs". Not all versions have been digitised. The family of typefaces was