Some people with special or particular needs find it very hard to talk to others, perhaps because they cannot speak or they are difficult to understand. One of the ICT solutions for this is a system that speaks for someone after they have typed what they want to say into a computer. The computer converts their text into voice-synthesised speech.
Possibly the most famous person using this type of system is Professor Stephen Hawking, one of the foremost physicists of our time. He has even had guest speaking roles on Star Trek and The Simpsons.