IA-32 Execution Layer
The IA-32 Execution Layer ( IA-32 EL ) is a software emulator in the form of a software driver that improves performance of 32-bit applications running on 64-bit Intel Itanium-based systems , particularly those running Linux and Windows Server 2003 ( it is included in Windows Server 2003 SP1 and later and in most Linux distributions for Itanium ) . 
<triplet> IA-32 Execution Layer <subj> emulator <obj> instance of <subj> software driver <obj> instance of <triplet> Itanium <subj> Intel <obj> manufacturer