I use MarcEdit for all the batch editing with MARC records. It's a free but powerful tool developed by Terry Reese: http://marcedit.reeset.net/ -----Original Message----- From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Schwartz, Raymond Sent: Thursday, August 28, 2014 4:00 PM To: [log in to unmask] Subject: [CODE4LIB] Anybody know a way to add a MARC tag on-mass to a file of MARC records Anybody know a way to add a MARC tag on-mass to a file of MARC records. I need to add the tag 918 $a with the contents "DELETE" to each of the records. Thanks in advance. /Ray Ray Schwartz Systems Specialist Librarian [log in to unmask]<blocked::mailto:[log in to unmask]> David and Lorraine Cheng Library Tel: +1 973 720-3192 William Paterson University Fax: +1 973 720-2585 300 Pompton Road Mobile: +1 201 424-4491 Wayne, NJ 07470-2103 USA http://nova.wpunj.edu/schwartzr2/<http://euphrates.wpunj.edu/faculty/schwartzr2/>