The correct answer is option 1 - Supercomputers. Tianhe-2, Titan, Mira, and Piz Daint are all examples of supercomputers. Supercomputers are high-performance computers that are designed to process large amounts of data at incredibly fast speeds. They are used for various complex calculations and simulations in fields such as weather forecasting, climate modeling, scientific research, and nuclear simulations.

Tianhe-2 was developed by China and was the world`s fastest supercomputer from 2013 to 2016. Titan is located in the United States and is known for its use in scientific research, particularly in energy and materials sciences. Mira, also located in the United States, is used for a wide range of scientific research, including studying the structure of proteins and improving understanding of supernovas and global climate change. Piz Daint is located in Switzerland and is known for its use in weather forecasting and climate modeling.

In summary, Tianhe-2, Titan, Mira, and Piz Daint are all examples of supercomputers known for their high-performance capabilities in processing large amounts of data.