and effective; and

- to provide a basis for future developments which will support the Library's
strategic objectives and be in line with the Library's information systems
strategy."

The Library of Congress Catalogs can be searched using four different methods:
a) Word Search; b) Browse Search; c) Command Search; and d) Experimental Search
System (ESS).

a) The Word Search's Z39.50 Gateway provides a simple search form for authors
and title queries and an advanced search form allowing the use of Boolean
operators (and, or, and not), with searches for subjects, names, titles, series,
notes, and various numbers. Some of these records have direct links to digitized
materials.

b) The Browse Search allows the user to browse and then select from alphabetical
indexes for the Library's catalogs, including subject cross references. One can
browse by subject, author (personal, corporate), conference, title, series,
Library of Congress Classification (partial call number), Dewey Decimal Number,
and standard numbers like the ISBN (international standard book number), the
ISSN (international standard serial number), and the LCCN (Library of Congress
control number).

c) The Command Search allows the use of commands which can be typed to search
for words and to browse indexes for the Library's catalogs, and for additional
non-catalog files. This method provides access to LOCIS (the Library of Congress
Information System, which is the original mainframe-based retrieval system),
with browsable indexes, word searches, Boolean combinations, various display
options, set creation, and advanced features for limiting and refining search
results. This method requires the Internet Telnet function (either Telnet or
tn3270) in order to connect to LOCIS. The Telnet capability comes with most WWW
browsers, but must be configured.

d) The Experimental Search System (ESS), currently located in the LC Web
research and development area, supports relevancy-ranked searching of catalog
records, as well as sorting and e-mailing search results. Special search
features include analyzing results by subject heading and "browsing" the shelf
for items with similar LC call numbers. Some of these records have direct links
to digitized materials, including selected full-text, image, video and audio
files, at the Library of Congress and elsewhere. This is a test system and
results may not be all inclusive.

The catalog records relate to books (9,543,910 a