0000950157-98-000493 SC 13D/A 1 19981209 ACTV INC /DE/ 0000854152 3663 942907258 DE 1231 SC 13D/A 34 005-41394 98766421 1270 AVE OF THE AMERICAS NEW YORK NY 10020 2122622571 12270 AVE OF THE AMERICAS #2401 12270 AVE OF THE AMERICAS #2401 NEW YORK NY 10020 WASHINGTON POST CO 0000104889 2711 530182885 DE 1231 SC 13D/A 1150 15TH ST NW WASHINGTON DC 20071 2023346000 SC 13D/A 1 000095015798000493-001-seq1-sc-13d-a.txt AMENDMENT NO. 4