Correspondence

Correspondence may refer to: In general usage, non-concurrent, remote communication between people, including letters, email, newsgroups, Internet forums, blogs.

==Science== Correspondence principle (physics): quantum physics theories must agree with classical physics theories when applied to large quantum numbers Correspondence principle (sociology), the relationship between social class and available education Correspondence problem (computer vision), finding depth information in stereography Regular sound correspondence (linguistics), see Comparative method (linguistics)