Doc: Update references and examples of old, unsupported OSes and uarches (GH-92791)

4 files changed, 7 insertions, 6 deletions

diff --git a/Doc/library/mmap.rst b/Doc/library/mmap.rst
index d19580c..36c15e9 100644
--- a/Doc/library/mmap.rst
+++ b/Doc/library/mmap.rst
@@ -102,7 +102,7 @@ To map anonymous memory, -1 should be passed as the fileno along with the length
 
    To ensure validity of the created memory mapping the file specified
    by the descriptor *fileno* is internally automatically synchronized
-   with physical backing store on macOS and OpenVMS.
+   with the physical backing store on macOS.
 
    This example shows a simple way of using :class:`~mmap.mmap`::
 
diff --git a/Doc/library/platform.rst b/Doc/library/platform.rst
index 346063d..dc2d871 100644
--- a/Doc/library/platform.rst
+++ b/Doc/library/platform.rst
@@ -53,7 +53,7 @@ Cross Platform
 
 .. function:: machine()
 
-   Returns the machine type, e.g. ``'i386'``. An empty string is returned if the
+   Returns the machine type, e.g. ``'AMD64'``. An empty string is returned if the
    value cannot be determined.
 
 
diff --git a/Doc/library/posix.rst b/Doc/library/posix.rst
index ad417a1..90be191 100644
--- a/Doc/library/posix.rst
+++ b/Doc/library/posix.rst
@@ -37,7 +37,7 @@ Large File Support
 
 .. sectionauthor:: Steve Clift <clift@mail.anacapa.net>
 
-Several operating systems (including AIX, HP-UX and Solaris) provide
+Several operating systems (including AIX and Solaris) provide
 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
diff --git a/Doc/library/struct.rst b/Doc/library/struct.rst
index eccba20..978eeab 100644
--- a/Doc/library/struct.rst
+++ b/Doc/library/struct.rst
@@ -146,9 +146,10 @@ If the first character is not one of these, ``'@'`` is assumed.
 
 Native byte order is big-endian or little-endian, depending on the host
 system. For example, Intel x86 and AMD64 (x86-64) are little-endian;
-Motorola 68000 and PowerPC G5 are big-endian; ARM and Intel Itanium feature
-switchable endianness (bi-endian). Use ``sys.byteorder`` to check the
-endianness of your system.
+IBM z and most legacy architectures are big-endian;
+and ARM, RISC-V and IBM Power feature switchable endianness
+(bi-endian, though the former two are nearly always little-endian in practice).
+Use ``sys.byteorder`` to check the endianness of your system.
 
 Native size and alignment are determined using the C compiler's
 ``sizeof`` expression.  This is always combined with native byte order.