The Newton platform was an early personal digital assistant and the first tablet platform developed by Apple, the second platform being iOS, used in the iPhone, iPod Touch and iPad. Development of the Newton platform started in 1987 and officially ended on February 27, 1998. Some electronic engineering and the manufacture of Apple's Newton devices was done by Motorola. Most Newton devices were based on the ARM 610 RISC processor and all featured handwriting recognition software. Most Newton devices were developed and marketed by Apple (this includes the whole MessagePad line and the eMate 300), but other companies — Motorola, Sharp, and Digital Ocean — also released devices that ran the Newton OS.