BASE24 is a series of applications produced by ACI Worldwide, Inc. that support payment systems used by large financial institutions.
BASE24-atm is an EFT processing and switching system that provides ATM support and management including transaction routing and authorization, electronic data interchange, settlement, reporting, network control, and stored-value card functionality.
[2] It is supported by mainframe computer platforms including z/OS, HP NonStop (Tandem), UNIX (IBM pSeries, Sun Sparc) and Linux (x86_64).
[3] BASE24-infobase is used to collect ATM transactions, including EFT payments, and distribute operational data, such as automated software updates.
It also has an ACI Commerce Gateway component which serves as a firewall between internal servers and the Internet or other payment networks.