The Great Kanto Earthquake occurred in 1923, and many people were affected by it.

This software has forward compatibility.

This software maintains backward compatibility.

An intercontinental ballistic missile is a weapon with a very large destructive power.

Functional analysis is a branch of mathematics that studies the properties of functions in infinite-dimensional spaces.

Simple Mail Transfer Protocol is a protocol for sending and receiving emails on the Internet.

These two software have complete interchangeability.

This compound is called cyclopentadecane.

He said, 'Misery of life starts at literacy,' and spoke about the hardships of learning.

This book has up to three volumes.