Newton
Newton may refer to any of the following:
1. When describing a person, Newton refers to the English scientist, Isaac Newton.
2. A Newton, symbol N, is the SI derived unit of force named after Isaac Newton. The Newton is the amount of force required to accelerate one-kilogram of mass by one meter per second.
1N = 1 kg · m/s2
3. The Newton platform was a PDA (personal digital assistant) that used a stylus as an input device. It started development by Apple in 1987 and was interacted with using gestures and handwritten text.
The picture is of a MessagePad 2000, which runs the Newton OS (operating system). The first model in the Apple Newton MessagePad line came out in 1993. Over the life of the series, there were many models including the eMate 300, MessagePad, MessagePad 100, MessagePad 110, MessagePad 120, MessagePad 130, and MessagePad 2100.
Using the Newton OS and stylus, you can take notes using the Notes program, store contact information in Names, schedule appointments in Dates, and use other programs.
Development for the Newton OS and the Newton platform officially ended on February 27, 1998. Apple later released the iPad.