Company:  CIENA CORP (CIEN)
Form Type:  10-K
Filing Date:  12/23/2008 
CIK:  0000936395 
Address:  1201 WINTERSON ROAD 
City, State, Zip:  LINTHICUM, Maryland 21090 
Telephone:  (410) 865-8500 
Fiscal Year:  10/31 
Last Trade
Last Trade: 
$13.17   		Change: 
-0.30 (-2.23%)  
Trade Time: 
Nov 20   		Market Cap: 
$1.21B
Description of Business
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  FORM 10-K
    PART I
      NAME AND TITLE
      Item 1A. Risk Factors
      Item 2. Properties
    PART II
      Item 5. Market for Registrant's Common Stock, Related ...
      Item 6. Selected Consolidated Financial Data
      Item 7. Management's Discussion and Analysis of Financial ...
        Liquidity and Capital Resources
      Item 7A. Quantitative and Qualitative Disclosures About ...
        Report of Independent Registered Public Accounting Firm
        BALANCE SHEET
        BALANCE SHEET
        INCOME STATEMENT
        STOCKHOLDERS EQUITY
        CASH FLOW
        NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
        OPTIONS AGGREGATE
      Item 9. Changes in and Disagreements with Accountants on ...
      Item 9A. Controls and Procedures
      Item 9B. Other Information
    PART III
      Item 10. Directors, Executive Officers and Corporate Governance
    PART IV
      Item 15. Exhibits and Financial Statement Schedules
    SIGNATURES
    INDEX TO EXHIBITS
  EXHIBIT 10.35
  EXHIBIT 12.1
    RATIO COMPUTATION
  EXHIBIT 21.1
  EXHIBIT 23.1
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  EXHIBIT 31.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
  EXHIBIT 31.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER
  EXHIBIT 32.1
  EXHIBIT 32.2
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