PROVIDING AN ON-LINE COMPUTER DATABASE CONSISTING OF A SEARCHABLE LIST OF THE GOODS AND SERVICES OF OTHERS; PROVIDING AN ON-LINE SEARCHABLE COMPUTER DATABASE FEATURING PRODUCT AND SERVICE INFORMATION RELATING TO THE GOODS AND SERVICES OF OTHERS; COMPUTERIZED DATABASE MANAGEMENT; DISSEMINATION OF ADVERTISING FOR OTHERS VIA AN ON-LINE ELECTRONIC COMMUNICATIONS NETWORK; PROMOTING THE GOODS AND SERVICES OF OTHERS BY PREPARING AND PLACING CLASSIFIED ADVERTISEMENTS THROUGH A GLOBAL COMPUTER NETWORK