Issue #17193: Use binary prefixes (KiB, MiB, GiB) for memory units.
diff --git a/Doc/library/posix.rst b/Doc/library/posix.rst
index 07db2b2..ba1b4b5 100644
--- a/Doc/library/posix.rst
+++ b/Doc/library/posix.rst
@@ -37,7 +37,7 @@
.. sectionauthor:: Steve Clift <clift@mail.anacapa.net>
Several operating systems (including AIX, HP-UX, Irix and Solaris) provide
-support for files that are larger than 2 GB from a C programming model where
+support for files that are larger than 2 GiB from a C programming model where
:c:type:`int` and :c:type:`long` are 32-bit values. This is typically accomplished
by defining the relevant size and offset types as 64-bit values. Such files are
sometimes referred to as :dfn:`large files`.