Of telephone numbers dialed in North America, having an additional charge assessed to the caller, part of which is returned to the owner of the number.

(soccer) The highest division of professional football in France.

A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant.

A selective service class denoting that the registrant is only available for noncombat military service due to their conscientious objector status

A selective service class denoting that the registrant a conscientious objector available for alternate service contributing to maintenance of national health, safety, or interest.

(medicine) Once per day, used for prescription directions.

Abbreviation of 1 Corinthians.

Initialism of one-dimensional.

Initialism of normal gravity., as in 1X gravity.

(British, navy) First Officer.