-
505.
Student societies
Subjects
-
506.
Subject catalogs
Subjects
Library catalogs
-
507.
Subscription television
Subjects
Television
-
508.
Syriac manuscripts
Subjects
Oriental manuscripts
-
509.
System analysis
Subjects
CyberneticsMathematical physicsMathematical modelsSystem theory
-
510.
System theory
Subjects
Philosophy of science
-
511.
Table of contents bulletins
Genre/Form
-
512.
Technical reports
Subjects
Scientific literature
-
513.
Technological literacy
Subjects
-
514.
Technology indicators
Subjects
-
515.
Telephone directories
Genre/Form
Directories
-
516.
Teletext systems
Subjects
Word processingData transmission systems
-
517.
Television
Subjects
Mass media
-
518.
Television broadcasting
Subjects
Audio-visual industry
-
519.
Television broadcasting of news
Subjects
Television programs
-
520.
Television directors
Subjects
-
521.
Television in education
Subjects
EducationAudio-visual educationMass media in education
-
522.
Television in politics
Subjects
-
523.
Television interviews
Genre/Form
-
524.
Television presenters
Subjects
Television
-
525.
Television production and direction
Subjects
-
526.
Television viewers
Subjects
Audiences
-
527.
Tourist maps
Subjects
MapsTourism
-
528.
Trade associations
Subjects
Last updated dated: 28/03/2026