AIX version 4.2 or higher
Hardware: IBM RISC System/6000, SP/1 or PowerPC;
               500M disk, 128M RAM

Red Hat Legacy, Enterprise, or Fedora Linux
Hardware: x86 500Mhz or higher; 500M disk; 512M RAM

LegacyAda

LegacyAda/6000
Requires AIX version 3.2.5, 4.1, 4.2 or 5.2

LegacyAda/390
Requires an IBM/390 running the MVS or VM operating system