High Level Language Application Programming Interface (HLLAPI) is a standard to access legacy information and applications housed on IBM® and Unisys mainframes, AS/400®, UNIX/VMS, and so on.
Examples of applications that provide HLLAPI are Attachmate EXTRA, Reflection, and IBM iSeries®. Terminal Emulators are typically used to connect to these legacy applications.
See the following topics for more information.