Transaction Processing Facility

TPF is an IBM real-time operating system for mainframe computers descended from the IBM System/360 family, including zSeries and System z9. The name is an initialism for Transaction Processing Facility.

TPF delivers fast, high-volume, high-throughput transaction processing, handling large, continuous loads of essentially simple transactions across large, geographically dispersed networks. The world's largest TPF-based systems are easily capable of processing tens of thousands of transactions per second. TPF is also designed for highly reliable, continuous (24×7) operation. It is not uncommon for TPF customers to have continuous online availability of a decade or more, even with system and software upgrades. This is due in part to the multi-mainframe operating capability and environment.