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Oracle® Solaris 64-bit Developer's Guide

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Updated: March 2019
Chapter 3

Comparing 32-Bit Interfaces and 64-Bit Interfaces

As discussed in Getting Past the 4 Gigabyte Barrier, to get the benefits of a 64-bit operating system you must convert the 32-bit applications to 64-bit applications. Some applications might only need to be recompiled as 64-bit applications; others must be converted.

Note -  Oracle Solaris 11 is a 64-bit only operating system.