All 4 Uses

correspond
in
The Hunt for Red October
(Auto-generated)

He had access to all of the correspondence from the former, while that from the latter had been carefully vetted since the Soviet armed services share as little information as possible.†
Chpt 5. *

correspondence = communication by written letters or messages
Moreover, there is no corresponding activity whatever in their other armed services.†
Chpt 6. *

corresponding = connected or fitting together by being equivalent, proportionate, or matched
Each scrambled three-letter group in this book corresponded to a preselected word or phrase in another book.†
Chpt 5.
Today the inside valve was closed, along with the corresponding through-hull fitting.†
Chpt 8.

Definitions:

(1) (correspond as in: corresponding time period)
connect or fit together by being equivalent, proportionate, or matched

(Two things are equivalent if they have the same or very similar value, purpose, or result.)
(2) (correspond as in: corresponding by email)
communicate -- typically by writing letters or email

A corresponding secretary is an officer of an organization who is responsible for managing the organization's correspondence and keeping a record of it.
(3) (correspondence as in: a correspondence course)
done from afar

For example, a corresponding member or a correspondence course.

This sense of corresponding arose because people who lived in distant cities and could not be present for meetings, could communicate by sending written communications.
(4) (correspondent as in: foreign correspondent of the paper)
a reporter or other representative -- typically from a foreign country or with a particular expertise
(5) (meaning too rare to warrant focus)