Corrigendum: `` PL360, a Programming Language for the 360 Computers''

With the exceptions of titles and type fonts, Appendix 2 (pp. 70-71) and Appendix 3 (pp, 72-74) are identical. As it stands, the title of Appendix 2 should read "PL360 Syntax (In convenient precedence form)." Actually, Appendix 2 is superfluous.