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        Signature
      
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        /s/ Melinda Wohl by Power of Attorney
      
      
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        Stock symbol
      
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        DPSI
      
      
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        Transactions as of
      
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        Jul 5, 2024
      
      
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        Transactions value $
      
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        -$511,021
      
      
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        Form type
      
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        4
      
      
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        Date filed
      
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        7/9/2024, 07:57 PM
      
 
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes | 
      
      
          
            | transaction | DPSI | Common Stock | Disposed to Issuer | -$431K | -42.2K | -100% | $10.22 | 0 | Jul 5, 2024 | Direct | F1 | 
      
    
   
  
    Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)
  
  
    
      
        
          | Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Underlying Class | Amount | Exercise Price | Ownership | Footnotes | 
      
      
          
            | transaction | DPSI | Stock Option (Right to Buy) | Disposed to Issuer | -$37K | -6K | -100% | $6.16 | 0 | Jul 5, 2024 | Common Stock | 6K | $4.06 | Direct | F2 | 
          
            | transaction | DPSI | Stock Option (Right to Buy) | Disposed to Issuer | -$5.64K | -6K | -100% | $0.94* | 0 | Jul 5, 2024 | Common Stock | 6K | $9.28 | Direct | F2 | 
          
            | transaction | DPSI | Stock Option (Right to Buy) | Disposed to Issuer | -$14.8K | -6K | -100% | $2.46* | 0 | Jul 5, 2024 | Common Stock | 6K | $7.76 | Direct | F2 | 
          
            | transaction | DPSI | Stock Option (Right to Buy) | Disposed to Issuer | -$22.5K | -6K | -100% | $3.75 | 0 | Jul 5, 2024 | Common Stock | 6K | $6.47 | Direct | F2 | 
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  John C. Guttilla is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may continue.
  
    Explanation of Responses: