The following publication type codes are used for cataloging purposes by the NSGL. You will find them in the second part of the NSGL document number. For searching purposes they must be doubled as shown below (the software will not allow for searching just one letter).

AA.......Promotional brochures

BB.......Books

CC.......Computer software (including manuals), CD-ROMs

DD.......Directories

EE.......Educational materials, including curriculum, and career information

FF.......Film lists, and descriptions of non-print media

GG.......General public and advisory reports and fact sheets

HH.......Handbooks, manuals, guides/aids

II.......Internet/electronic resources (available on web only)

LL.......Bibliographies, publication lists, indexes

MM.......Maps, atlases, and charts (also use type code C for older map collections)

NN.......Newsletters

OO.......Miscellaneous reports, papers, special collections

PP.......Patents

QQ.......Sea Grant programs' quarterly, annual, progress reports; program guides; implementation, strategic planning reports

RR.......Reprints from books, journals, proceedings

SS.......Surveys or evaluations

TT.......Technical reports

VV.......Videos

WW.......Workshops, proceedings, symposiums (including highlights/summaries of)

XX.......Thesis/dissertation abstracts

YY.......Full Theses/Dissertations