US-ASCII
<character> The 7-bit version of {ASCII}, which preceded (and
is the basis for) 8-bit versions such as {Latin-1}, {MacASCII}
and later, even larger coded character sets such as {Unicode}.
US-ASCII is defined in Standard ANSI X3.4-1986,
"US-ASCII. Coded Character Set - 7-Bit American Standard Code
for Information Interchange".
(1998-10-18)