The TPF operating system is a high availability, high-performance, extremely responsive communications system to handle high volumes of messages and transactions with good database integrity. It supports the functions of a business where the system is in direct contact with the user.
The z/TPF applications are used by businesses and organizations that have high online transaction volumes and large networks like credit card verification, depositing or withdrawing money in a bank account, or reserving an airline seat. A typical TPF system might support thousands of terminals (although some systems of only a few hundred terminals exist).