What to Expect at Apple’s iPhone Event Tomorrow: 'S' and Beyond

Apple has used "s" branding for several iPhone models over the years, including the iPhone 4s, iPhone 5s, and iPhone 6s, which were iterative versions of the iPhone 4, iPhone 5, and iPhone 6 respectively.

from Top Tech News- News18.com https://www.news18.com/news/tech/apple-iphone-xc-xs-xs-plus-ipad-pro-macbook-and-more-everything-that-is-expected-to-launch-on-september-12-1874023.html