Company:  AMERICAN SCIENCE & ENGINE ... (ASEI)
Form Type:  10-Q
Filing Date:  11/8/2011 
CIK:  0000005768 
Address:  C/O AS&E
829 MIDDLESEX TURNPIKE 
City, State, Zip:  BILLERICA, Massachusetts 01821 
Telephone:  (978) 262-8700 
Fiscal Year:  03/31 
Last Trade
Last Trade: 
$58.57   		Change: 
-1.57 (-2.61%)  
Trade Time: 
May 22   		Market Cap: 
$477.70M
Description of Business
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  FORM 10-Q
    PART I - FINANCIAL INFORMATION
      ITEM 1 - FINANCIAL STATEMENTS
        BALANCE SHEET
        INCOME STATEMENT
        CASH FLOW
        NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
      ITEM 2 - MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
      ITEM 3 - QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 4 - CONTROLS AND PROCEDURES
    PART II - OTHER INFORMATION
      ITEM 1A - RISK FACTORS
      ITEM 2 - UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF ...
      ITEM 6 - EXHIBITS
    SIGNATURES
    EXHIBIT INDEX
  EXHIBIT 31.1
    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
  EXHIBIT 31.2
    CERTIFICATION OF CHIEF FINANCIAL OFFICER
  EXHIBIT 32.1
    CERTIFICATION PURSUANT TO
  EXHIBIT 32.2
    CERTIFICATION PURSUANT TO
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