What is WABI?

WABI is "Windows Application Binary Interface."
WABI 2.2 (which ships with Solaris 2.5.1) runs old 16-bit
native MS Windows 3.x programs.
No support is planned for 32-bit
MS Windows 9x/ME/NT/2K/XP
programs.

Support for WABI has been dropped starting with Solaris 7.
and is replaced by SunPCi (see the next question).

[Adapted from Casper Dik's Solaris 2 FAQ]