0001026608-00-000008 10-K 2 19991231 20000329 AAON INC 0000824142 3585 870448736 NV 1231 10-K 34 000-18953 582899 2425 SOUTH YUKON TULSA OK 74107*1300 9185832266 2425 SOUTH YUKON 2425 SOUTH YUKON TULSA OK 74107 DIAMOND HEAD RESOURCES INC 19900808 10-K 1 000102660800000008-001-seq1-10-k.txt FORM 10-K FOR PERIOD ENDED 12/31/99 EX-27 2 000102660800000008-002-seq2-ex-27.txt