requirement that it be one less than a power of two. Although
compiler options can raise @code{UINT_MAX} to be @math{2^{36} - 1},
this can break system code that uses @math{-0} as a flag value.
-This platform's architecture descends from the UNIVAC 1107 (1962).
+This platform's architecture descends from the UNIVAC 1103 (1953).
@item
-The Unisys ClearPath Libra's machine word is 48 bits. Its
+The Unisys ClearPath Libra's machine word is 48 bits
+with a 4-bit tag and a 4-bit data extension. Its
@code{unsigned int} uses the low-order 40 bits of the word, and
@code{int} uses the low-order 41 bits of the word with a
signed-magnitude representation. On these machines, @code{INT_MAX ==