Predictive typing and automated customer service chat are applications of:

1. Natural Language Processing deals with interaction between humans and computers using spoken languages. 2. Predictive typing, which suggests the next word while you type, is given as an example of NLP. 3. Spell checking is another example of the same field. 4. An NLP system can also perform text-to-speech and speech-to-text conversion. 5. Automated customer service, where software answers customer queries, is named as an emerging NLP application. _Source: NCERT Informatics Practices Class 11, Ch 2 'Emerging Trends', S2.2.2 Natural Language Processing (NLP)_