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