-
481.
Specialists
Subjects
-
482.
Sports journalism
Subjects
Journalism
-
483.
Standard operating procedures
Subjects
-
484.
Standardization
Subjects
-
485.
Standards
Subjects
Quality assurance
-
486.
Student newspapers and periodicals
Genre/Form
-
487.
Student societies
Subjects
-
488.
Subject catalogs
Subjects
Library catalogs
-
489.
Subscription television
Subjects
Television
-
490.
Syriac manuscripts
Subjects
-
491.
System analysis
Subjects
CyberneticsMathematical physicsMathematical modelsSystem theory
-
492.
System theory
Subjects
Philosophy of science
-
493.
Table of contents bulletins
Genre/Form
-
494.
Technical reports
Subjects
Scientific literature
-
495.
Technological literacy
Subjects
-
496.
Technology indicators
Subjects
-
497.
Telephone directories
Genre/Form
Directories
-
498.
Teletext systems
Subjects
Word processingData transmission systems
-
499.
Television
Subjects
Mass media
-
500.
Television broadcasting
Subjects
Audio-visual industry
-
501.
Television broadcasting of news
Subjects
Television programs
-
502.
Television directors
Subjects
-
503.
Television in education
Subjects
EducationAudio-visual educationMass media in education
-
504.
Television in politics
Subjects