Sub System

The 400 comes with specialized environments for managing various types of work or functions such as:

• Interactive Processing
  • Short Transactions
• Batch Processing
  • Complicated heavy Data Base Access
• Spooling
  • minimal resource vs. Printers

Think of SubSystems as the Jobs that run other Jobs. They monitor and direct what resources needed, such as CPU, pools of main storage, disk space, how many concurrent jobs allowed, type of resources they may use.

Sources of work for each subsystem

• Autostart jobs
• Work stations of users
• Jobqueues JOBQ
• Communications