0000950133-98-004086 10-K 5 19981031 19981210 CIENA CORP 0000936395 3661 232725311 DE 1031 10-K 34 000-21969 98767480 1201 WINTERSON ROAD LINTHICUM MD 21090 4108658500 1201 WINTERSON ROAD LINTHICUM MD 21090 10-K 1 000095013398004086-001-seq1-10-k.txt FORM 10-K EX-10.17 2 000095013398004086-002-seq2-ex-10-17.txt THIRD ADDENDUM TO PROCUREMENT AGREEMENT EX-10.18 3 000095013398004086-003-seq3-ex-10-18.txt FORM OF TRANSFER OF CONTROL/SEVERANCE AGREEMENT EX-23.1 4 000095013398004086-004-seq4-ex-23-1.txt CONSENT OF INDEPENDENT ACCOUNTANTS EX-27 5 000095013398004086-005-seq5-ex-27.txt FINANCIAL DATA SCHEDULE