Character Set 
Symbol für Hamburger-Menü mit einfarbiger Füllung
Hierarchie mit einfarbiger Füllung
 
               
                 
                         
Character Set level A
ISO 646,  7-bit single byte code, with the exception of lower case letters and certain graphic character allocations contains the following characters: 
Letters, upper case A to Z
Numerals  0 to 9
Space character  
Full stop .
Comma ,
Hyphen/minus sign -
Opening parentheses (
Closing parentheses )
Oblique stroke (slash) /
Equal sign =
Exclamation mark !
Quotation mark "
Percentage sign %
Ampersand &
Asterisk *
Semi-colon ;
Less-than sign < 
Greater-than sign > 
Character Set level B
ISO 646, 7-bit single byte code, with the exception of certain graphic character allocations
contains character set level A plus
lower case letters "a" to "z".
Character Set level C see UNB F#0001
ISO 8859-1, 8-bit single byte code,
contains character set level B plus
more characters covering Latin 1 alphabet
with following languages:
Danish, Dutch, English, Faeroese, Finnish, French, German, Icelandic, Irish, Italian, Norwegian, Portuguese, Spanish, Swedish