So I would suggest cell phone, Skype and email correspondence are the best technologies to communicate with one another, discussing views in a group and finally coming to a solution for a world problem after a round of several virtual meetings. We all know that Siri, Google Now, and Cortana are all intelligent digital personal assistants on various platforms (iOS, Android, and Windows Mobile).
In short, they help find useful information when you ask for it is using your voice; you can say “Where’s the nearest Indian restaurant?”, “What’s on my schedule today?”, “Remind me to call Mom or Dad at eight o’clock,” and the assistant will respond by finding information, relaying information from your phone, or sending commands to other apps.