1 Data, information, knowledge
2 Information process
3 Information resources structure
4 Document searching
5 Systematic retrieval languages
6 Subject retrieval languages
7 Character coding
8 Data presentation, processing and storage
9 Database systems
10 Relational database
11 Hardware
12 Computer classification
13 Software classification
2 Information process
3 Information resources structure
4 Document searching
5 Systematic retrieval languages
6 Subject retrieval languages
7 Character coding
8 Data presentation, processing and storage
9 Database systems
10 Relational database
11 Hardware
12 Computer classification
13 Software classification