S Pen (Korean: S펜) is a wireless digital pen stylus designed and developed by Samsung Electronics featuring Wacom's digital pen technology. It is made for use with supported Galaxy mobile devices like smartphones and tablets, as well as selected Samsung Notebook, Samsung Galaxy Book, and Chromebook notebooks. It was first released with the Samsung Galaxy Note series in 2011, becoming a core feature of the Note line of products. The S Pen supports features such as translating text by hovering the pen, and creating animated messages.

In computing, a stylus is a small pen-shaped instrument whose tip position on a computer monitor can be detected. It is used to draw, or make selections by tapping. While devices with touchscreens such as newer computers, mobile devices, game consoles, and graphics tablets can usually be operated with a fingertip, a stylus provides more accurate and controllable input. The stylus has the same function as a mouse or touchpad as a pointing device; its use is commonly called pen computing.