from 8 bit byte extensions of Hollerith punched card encodings.
The layout on the cards was such that high bits were set for the
upper and lower case alphabet characters [a-z] and [A-Z], but there
-were gaps within each latin alphabet range.
+were gaps within each Latin alphabet range.
Some IBM EBCDIC character sets may be known by character code set
identification numbers (CCSID numbers) or code page numbers. Leading
You may see the term C<invariant> character or code point.
This simply means that the character has the same numeric
value when encoded as when not.
-(Note that this is a very different concept from L<The /13 variant characters>
+(Note that this is a very different concept from L</The 13 variant characters>
mentioned above.)
For example, the ordinal value of 'A' is 193 in most EBCDIC code pages,
and also is 193 when encoded in UTF-EBCDIC.