P. O.—Post Office.
Prof.—Professor.
P. S.—Postscript.
Rev.—Reverend.
S. B. or Sc. B.—Bachelor of Science.
Sc. D.—Doctor of Science.
S. T. B.—Bachelor of Sacred Theology.
S. T. D.—Doctor of Sacred Theology.
Rt. Hon.—Right Honorable.
Rt. Rev.—Right Reverend.