,---------------.   
  |Payment Service|   
  |---------------|   
  `---------------'   
           |          
           |          
,-------------------. 
|Accounting Service | 
|-------------------| 
`-------------------' 
           |          
  ,----------------.  
  |Transfer Service|  
  |----------------|  
  `----------------'  
           |          
                      
  ,----------------.  
  |Checkout Service|  
  |----------------|  
  `----------------'  
           |          
   ,--------------.   
   |Backup Service|   
   |--------------|   
   `--------------'   
           |          
,-------------------. 
|LedgerCheck Service| 
|-------------------| 
`-------------------' 
           |          
           |          
,--------------------.
|Item Booking Service|
|--------------------|
`--------------------'
           |          
,-------------------. 
|Item Cancel Service| 
|-------------------| 
`-------------------' 
           |          
                      
 ,------------------. 
 |Statistics Service| 
 |------------------| 
 `------------------' 
           |          
   ,--------------.   
   |Secret Service|   
   |--------------|   
   `--------------'