diff --git a/doc/diffutils.texi b/doc/diffutils.texi
index e428646..d0c3549 100644
--- a/doc/diffutils.texi
+++ b/doc/diffutils.texi
@@ -3587,20 +3587,16 @@ In the above table, operands that are byte counts are normally
 decimal, but may be preceded by @samp{0} for octal and @samp{0x} for
 hexadecimal.
 
-A byte count can be followed by a suffix to specify a multiple of that
-count; in this case an omitted integer is understood to be 1.  A bare
-size letter, or one followed by @samp{iB}, specifies a multiple using
-powers of 1024.  A size letter followed by @samp{B} specifies powers
-of 1000 instead.  For example, @option{-n 4M} and @option{-n 4MiB} are
-equivalent to @option{-n 4194304}, whereas @option{-n 4MB} is
-equivalent to @option{-n 4000000}.  This notation is upward compatible
-with the @uref{http://www.bipm.fr/enus/3_SI/si-prefixes.html, SI
-prefixes} for decimal multiples and with the
-@uref{http://physics.nist.gov/cuu/Units/binary.html, IEC 60027-2
-prefixes for binary multiples}.
+A byte count can be followed by a suffix to specify a
+multiple of the count.  A bare letter,
+or one followed by @samp{iB}, specifies
+a multiple using powers of 1024.  A letter followed by @samp{B}
+specifies powers of 1000 instead.  For example, @samp{-n 1M} and
+@samp{-n 1MiB} are equivalent to @samp{-n 1048576}, whereas @samp{-n 1MB} is
+equivalent to @samp{-n 1000000}.
 
-The following suffixes are defined.  Large sizes like @code{1Y} may be
-rejected by your computer due to limitations of its arithmetic.
+The following suffixes are defined.  Large sizes like @code{1Q}
+may be rejected by your computer due to limitations of its arithmetic.
 
 @table @samp
 @item kB
@@ -3610,8 +3606,8 @@ kilobyte: @math{10^3 = 1000}.
 @itemx K
 @itemx KiB
 @cindex kibibyte, definition of
-kibibyte: @math{2^10 = 1024}.  @samp{K} is special: the SI prefix is
-@samp{k} and the IEC 60027-2 prefix is @samp{Ki}, but tradition and
+kibibyte: @math{2^{10} = 1024}.  @samp{K} is special: the SI prefix is
+@samp{k} and the ISO/IEC 80000-13 prefix is @samp{Ki}, but tradition and
 POSIX use @samp{k} to mean @samp{KiB}.
 @item MB
 @cindex megabyte, definition of
@@ -3619,49 +3615,59 @@ megabyte: @math{10^6 = 1,000,000}.
 @item M
 @itemx MiB
 @cindex mebibyte, definition of
-mebibyte: @math{2^20 = 1,048,576}.
+mebibyte: @math{2^{20} = 1,048,576}.
 @item GB
 @cindex gigabyte, definition of
 gigabyte: @math{10^9 = 1,000,000,000}.
 @item G
 @itemx GiB
 @cindex gibibyte, definition of
-gibibyte: @math{2^30 = 1,073,741,824}.
+gibibyte: @math{2^{30} = 1,073,741,824}.
 @item TB
 @cindex terabyte, definition of
-terabyte:  @math{10^12 = 1,000,000,000,000}.
+terabyte:  @math{10^{12} = 1,000,000,000,000}.
 @item T
 @itemx TiB
 @cindex tebibyte, definition of
-tebibyte: @math{2^40 = 1,099,511,627,776}.
+tebibyte: @math{2^{40} = 1,099,511,627,776}.
 @item PB
 @cindex petabyte, definition of
-petabyte: @math{10^15 = 1,000,000,000,000,000}.
+petabyte: @math{10^{15} = 1,000,000,000,000,000}.
 @item P
 @itemx PiB
 @cindex pebibyte, definition of
-pebibyte: @math{2^50 = 1,125,899,906,842,624}.
+pebibyte: @math{2^{50} = 1,125,899,906,842,624}.
 @item EB
 @cindex exabyte, definition of
-exabyte: @math{10^18 = 1,000,000,000,000,000,000}.
+exabyte: @math{10^{18} = 1,000,000,000,000,000,000}.
 @item E
 @itemx EiB
 @cindex exbibyte, definition of
-exbibyte: @math{2^60 = 1,152,921,504,606,846,976}.
+exbibyte: @math{2^{60} = 1,152,921,504,606,846,976}.
 @item ZB
 @cindex zettabyte, definition of
-zettabyte: @math{10^21 = 1,000,000,000,000,000,000,000}
+zettabyte: @math{10^{21} = 1,000,000,000,000,000,000,000}
 @item Z
 @itemx ZiB
-@math{2^70 = 1,180,591,620,717,411,303,424}.
-(@samp{Zi} is a GNU extension to IEC 60027-2.)
+zebibyte: @math{2^{70} = 1,180,591,620,717,411,303,424}.
 @item YB
 @cindex yottabyte, definition of
-yottabyte: @math{10^24 = 1,000,000,000,000,000,000,000,000}.
+yottabyte: @math{10^{24} = 1,000,000,000,000,000,000,000,000}.
 @item Y
 @itemx YiB
-@math{2^80 = 1,208,925,819,614,629,174,706,176}.
-(@samp{Yi} is a GNU extension to IEC 60027-2.)
+yobibyte: @math{2^{80} = 1,208,925,819,614,629,174,706,176}.
+@item RB
+@cindex ronnabyte, definition of
+ronnabyte: @math{10^{27} = 1,000,000,000,000,000,000,000,000,000}.
+@item R
+@itemx RiB
+robibyte: @math{2^{90} = 1,237,940,039,285,380,274,899,124,224}.
+@item QB
+@cindex quettabyte, definition of
+quettabyte: @math{10^{30} = 1,000,000,000,000,000,000,000,000,000,000}.
+@item Q
+@itemx QiB
+quebibyte: @math{2^{100} = 1,267,650,600,228,229,401,496,703,205,376}.
 @end table
 
 @node Invoking diff