Here are entered works on equipment used to provide medical care. Works on equipment that provides the user with a safe supply of air or oxygen in an environment where air is unavailable or unsafe to breathe are entered under Breathing apparatus.
Here are entered works containing the formal or general prayers used in public worship. Prayers offered on behalf of clergy are entered under Prayers for clergy. Collections of prayers and devotions for personal use by clergy are entered under Clergy--Prayers and devotions.
Here are entered works on the felling of trees through the transporting of logs to sawmills or to a place of sale. Works on the manufacturing of logs into lumber are entered under Lumbering.