ARTICLEFIRST by OCLC, INC. (Track this)
Intl: (035) Advertising and business; (038) Telecommunications; (042) Computer, scientific & legal US: 101; 104; 100 Filing date: 25-Mar-1993 Serial number: 74373100
DDC by OCLC, INC. (Track this)
Intl: (041) Education and entertainment US: 101; 107 Filing date: 17-Oct-1986 Serial number: 73626047
DEWEY DECIMAL CLASSIFICATION by OCLC, INC. (Track this)
Intl: (016) Paper goods and printed matter US: 038 Filing date: 09-May-1962 Serial number: 72144162