The Samsung Galaxy Note series is a series of high-end Android-based smartphones phablets and tablets developed and marketed by Samsung Electronics. The line is primarily oriented towards pen computing; all Galaxy Note models ship with a stylus pen and incorporate a pressure-sensitive Wacom digitizer. All Galaxy Note models also include software features that are oriented towards the stylus and the devices' large screens, such as note-taking and digital scrapbooking apps, and split-screen multitasking. The Galaxy Note smartphones have been considered the first commercially successful examples of "phablets"—a class of smartphone with large screens that are intended to straddle the functionality of a traditional tablet with that of a phone. Samsung sold over 50 million Galaxy Note devices between September 2011 and October 2013. 10 million units of the Galaxy Note 3 have been sold within its first 2 months, 30 million were of the Note II, while the original Galaxy Note sold around 10 million units worldwide.