Communicator, PDA, Smartphone, telephone. Until a certain moment in my head was confusion – I did not feel much difference. No, well, of course, the phone is clear. But then – no. Had to turn to 'Wikipedia' and found following: PDA and phone – it's as if the two poles of the devices that surround the communicator and the smartphone.
PDA – a portable computing device, which has extensive features. English name Personal Digital Assistant (PDA) in the Russian language can be translated as "personal digital assistants." Originally intended for use PDAs as electronic organizers. Communicator – Pocket PC complete with the functionality of a mobile phone. Smartphone – mobile phone c enhanced functionality comparable to the PDA. The difference between the communicator and the smartphone can be described as follows: if the device is focused on management of the available buttons – this is a smartphone, but if the device has a touch screen and stylus-oriented management – this is a communicator. PDA, communicators and smartphones equipped with a mobile operating system. It may be: Windows Mobile Symbian OS Palm OS Mac OS RIM Android Windows Mobile – the name is clear that this is a mobile, Windows, and who is the manufacturer of the system. The OS is characteristic of most PDAs and smartphones, widespread in our country. What can be noted from himself. For this system, written many programs that can easily be found freely available on the Internet, so the functionality of the device can easily be expanded.