The Satellite S series was Toshiba Information Systems' midrange line of Satellite laptops. It was introduced in 2012, positioned above their mainstream L series but below the premium P range. Features included Nvidia GeForce graphics processing units, Harman Kardon speakers, optional touchscreen displays, and optional backlit keyboards; it was the lowest-priced entry of the Satellite family to offer discrete graphics. Displays ranged from 14 to 17.3-inches diagonally in size, with only displays 15.6-inches diagonally or larger affording the option for full 1080p resolution initially—14-in panels were limited to 1366 × 768. The series was refreshed in 2015 to add a 4K panel option and raise the minimum screen size to 15.6-inches diagonally. The first models of the S series included an optical drive bay, with an option for a Blu-ray drive. The bay was removed in a 2014 refresh to make the laptop slimmer but restored in the 2015 refresh.