On 10 March 2006 I published "A 'Cadillac' Quadratic Solver for the hp 33s" as Article 593. There were three errors in the program listing. I as unable to edit the article because of password problems. Dave suggested that I submit a new article with a correct listing.
Article 881 "A 'Cadillac' Quadratic Solver for the hp 33s and HP35s" includes a correct listing for the hp 33s program. It also includes a listing for an HP35s program which uses direct addressing to conserve program labels.
I have asked Dave to delete Article 593.