April 2-4: Softbank Exposition & Conference Company, "JavaOne: Sun's Worldwide Jave Developer Conference," San Francisco, 415/578-6900.
April 4: Effective Communications Group, "Effective Feature Writing Seminar," Princeton, N.J., 201/444-3147.
April 6-11: Columbia Business School, "Sales Management," Harriman or Tarrytown, New York, 800/692-3932.
April 7: Effective Communications Group, "Effective Feature Writing Seminar," Tampa, Fla., 201/444-3147.
April 7-8: Public Affairs Council, "Massachusetts State Government Relationships Workshop," Boston, 202/872-1790.
April 7-11: Softbank Exposition & Conference Company, "NetWorld+Interop 97 Sydney," Sydney, 415/578-6900.
April 8-9: Promotion Marketing Association of America, Inc., "Basics of Promotion Marketing," New York, 212/420-1100.
April 8-11: The Center for Corporate Community Relations, "Building Strategic Alliances with Advocacy Groups," Boston, 617/552-4545.
April 9-10: Author Page Society, "Spring Seminar," New York, 303/215-1890.
April 9-11: American Association of Advertising Agencies, "AAAA Annual Meeting," Aventura, Fla., 212/682-2500.
April 10-11: Clemson University, School of Professional Studies, "Effective Seminar/Conference Marketing," San Francisco, 864/656-3990.
April 11: Canadian Council for Public Affairs Advancement, "Workshop: Managing Responses to Regulation and Regulatory Issues," Ottawa, 416/675-6622 (x3465).