title: Transaction Processing Management System
text: # Transaction Processing Management System
  
  Transaction Processing Management System (TPMS) is an online transaction processing superstructure software from ICL (now Fujitsu Services) that runs on their VME mainframe computers. The first versions were released in the mid-1970s and were sold worldwide.
  
  ## Structure
  
  The service runs in at least two Virtual Machines (VMs)
  
  * a Control VM (CVM), responsible for connecting, disconnecting terminals and routing messages
  * one or more Application VMs (AVMs), responsible for all application processing - receiving input messages and returning output messages.
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