there's a whole lot more one can do - but keep in mind how it displays will depend on the user "character set" - different languages sets produce different "symbols" for a given "code numbers"
from my history files of things one might really not want to know. . . 
The first 32 characters in the ASCII-table are unprintable control codes and are used to control peripherals such as printers.
DEC     OCT     HEX     BIN     Symbol     HTML Number     HTML Name     Description
0    000    00    00000000    NUL    �         Null char
1    001    01    00000001    SOH             Start of Heading
2    002    02    00000010    STX             Start of Text
3    003    03    00000011    ETX             End of Text
4    004    04    00000100    EOT             End of Transmission
5    005    05    00000101    ENQ             Enquiry
6    006    06    00000110    ACK             Acknowledgment
7    007    07    00000111    BEL             Bell
8    010    08    00001000    BS             Back Space
9    011    09    00001001    HT    	         Horizontal Tab
10    012    0A    00001010    LF              Line Feed
11    013    0B    00001011    VT             Vertical Tab
12    014    0C    00001100    FF             Form Feed
13    015    0D    00001101    CR              Carriage Return
14    016    0E    00001110    SO             Shift Out / X-On
15    017    0F    00001111    SI             Shift In / X-Off
16    020    10    00010000    DLE             Data Line Escape
17    021    11    00010001    DC1             Device Control 1 (oft. XON)
18    022    12    00010010    DC2             Device Control 2
19    023    13    00010011    DC3             Device Control 3 (oft. XOFF)
20    024    14    00010100    DC4             Device Control 4
21    025    15    00010101    NAK             Negative Acknowledgement
22    026    16    00010110    SYN             Synchronous Idle
23    027    17    00010111    ETB             End of Transmit Block
24    030    18    00011000    CAN             Cancel
25    031    19    00011001    EM             End of Medium
26    032    1A    00011010    SUB             Substitute
27    033    1B    00011011    ESC             Escape
28    034    1C    00011100    FS             File Separator
29    035    1D    00011101    GS             Group Separator
30    036    1E    00011110    RS             Record Separator
31    037    1F    00011111    US             Unit Separator
ASCII printable characters (character code 32-127)
Codes 32-127 are common for all the different variations of the ASCII table, they are called printable characters, represent letters, digits, punctuation marks, and a few miscellaneous symbols. You will find almost every character on your keyboard. Character 127 represents the command DEL.
DEC     OCT     HEX     BIN     Symbol     HTML Number     HTML Name     Description
32    040    20    00100000                   Space
33    041    21    00100001    !    !         Exclamation mark
34    042    22    00100010    "    "    "    Double quotes (or speech marks)
35    043    23    00100011    #    #         Number
36    044    24    00100100    $    $         Dollar
37    045    25    00100101    %    %         Procenttecken
38    046    26    00100110    &    &    &    Ampersand
39    047    27    00100111    '    '         Single quote
40    050    28    00101000    (    (         Open parenthesis (or open bracket)
41    051    29    00101001    )    )         Close parenthesis (or close bracket)
42    052    2A    00101010    *    *         Asterisk
43    053    2B    00101011    +    +         Plus
44    054    2C    00101100    ,    ,         Comma
45    055    2D    00101101    -    -         Hyphen
46    056    2E    00101110    .    .         Period, dot or full stop
47    057    2F    00101111    /    /         Slash or divide
48    060    30    00110000    0    0         Zero
49    061    31    00110001    1    1         One
50    062    32    00110010    2    2         Two
51    063    33    00110011    3    3         Three
52    064    34    00110100    4    4         Four
53    065    35    00110101    5    5         Five
54    066    36    00110110    6    6         Six
55    067    37    00110111    7    7         Seven
56    070    38    00111000    8    8         Eight
57    071    39    00111001    9    9         Nine
58    072    3A    00111010    :    :         Colon
59    073    3B    00111011    ;    ;         Semicolon
60    074    3C    00111100    <    <    <    Less than (or open angled bracket)
61    075    3D    00111101    =    =         Equals
62    076    3E    00111110    >    >    >    Greater than (or close angled bracket)
63    077    3F    00111111    ?    ?         Question mark
64    100    40    01000000    @    @         At symbol
65    101    41    01000001    A    A         Uppercase A
66    102    42    01000010    B    B         Uppercase B
67    103    43    01000011    C    C         Uppercase C
68    104    44    01000100    D    D         Uppercase D
69    105    45    01000101    E    E         Uppercase E
70    106    46    01000110    F    F         Uppercase F
71    107    47    01000111    G    G         Uppercase G
72    110    48    01001000    H    H         Uppercase H
73    111    49    01001001    I    I         Uppercase I
74    112    4A    01001010    J    J         Uppercase J
75    113    4B    01001011    K    K         Uppercase K
76    114    4C    01001100    L    L         Uppercase L
77    115    4D    01001101    M    M         Uppercase M
78    116    4E    01001110    N    N         Uppercase N
79    117    4F    01001111    O    O         Uppercase O
80    120    50    01010000    P    P         Uppercase P
81    121    51    01010001    Q    Q         Uppercase Q
82    122    52    01010010    R    R         Uppercase R
83    123    53    01010011    S    S         Uppercase S
84    124    54    01010100    T    T         Uppercase T
85    125    55    01010101    U    U         Uppercase U
86    126    56    01010110    V    V         Uppercase V
87    127    57    01010111    W    W         Uppercase W
88    130    58    01011000    X    X         Uppercase X
89    131    59    01011001    Y    Y         Uppercase Y
90    132    5A    01011010    Z    Z         Uppercase Z
91    133    5B    01011011    [    [         Opening bracket
92    134    5C    01011100    \    \         Backslash
93    135    5D    01011101    ]    ]         Closing bracket
94    136    5E    01011110    ^    ^         Caret - circumflex
95    137    5F    01011111    _    _         Underscore
96    140    60    01100000    `    `         Grave accent
97    141    61    01100001    a    a         Lowercase a
98    142    62    01100010    b    b         Lowercase b
99    143    63    01100011    c    c         Lowercase c
100    144    64    01100100    d    d         Lowercase d
101    145    65    01100101    e    e         Lowercase e
102    146    66    01100110    f    f         Lowercase f
103    147    67    01100111    g    g         Lowercase g
104    150    68    01101000    h    h         Lowercase h
105    151    69    01101001    i    i         Lowercase i
106    152    6A    01101010    j    j         Lowercase j
107    153    6B    01101011    k    k         Lowercase k
108    154    6C    01101100    l    l         Lowercase l
109    155    6D    01101101    m    m         Lowercase m
110    156    6E    01101110    n    n         Lowercase n
111    157    6F    01101111    o    o         Lowercase o
112    160    70    01110000    p    p         Lowercase p
113    161    71    01110001    q    q         Lowercase q
114    162    72    01110010    r    r         Lowercase r
115    163    73    01110011    s    s         Lowercase s
116    164    74    01110100    t    t         Lowercase t
117    165    75    01110101    u    u         Lowercase u
118    166    76    01110110    v    v         Lowercase v
119    167    77    01110111    w    w         Lowercase w
120    170    78    01111000    x    x         Lowercase x
121    171    79    01111001    y    y         Lowercase y
122    172    7A    01111010    z    z         Lowercase z
123    173    7B    01111011    {    {         Opening brace
124    174    7C    01111100    |    |         Vertical bar
125    175    7D    01111101    }    }         Closing brace
126    176    7E    01111110    ~    ~         Equivalency sign - tilde
127    177    7F    01111111                 Delete
The extended ASCII codes (character code 128-255)
There are several different variations of the 8-bit ASCII table. The table below is according to ISO 8859-1, also called ISO Latin-1. Codes 129-159 contain the Microsoft® Windows Latin-1 extended characters.
DEC     OCT     HEX     BIN     Symbol     HTML Number     HTML Name     Description
128    200    80    10000000    €    €    €    Euro sign
129    201    81    10000001                    
130    202    82    10000010    ‚    ‚    ‚    Single low-9 quotation mark
131    203    83    10000011    ƒ    ƒ    ƒ    Latin small letter f with hook
132    204    84    10000100    „    „    „    Double low-9 quotation mark
133    205    85    10000101    …    …    …    Horizontal ellipsis
134    206    86    10000110    †    †    †    Dagger
135    207    87    10000111    ‡    ‡    ‡    Double dagger
136    210    88    10001000    ˆ    ˆ    ˆ    Modifier letter circumflex accent
137    211    89    10001001    ‰    ‰    ‰    Per mille sign
138    212    8A    10001010    Š    Š    Š    Latin capital letter S with caron
139    213    8B    10001011    ‹    ‹    ‹    Single left-pointing angle quotation
140    214    8C    10001100    Œ    Œ    Œ    Latin capital ligature OE
141    215    8D    10001101                    
142    216    8E    10001110    Ž    Ž         Latin captial letter Z with caron
143    217    8F    10001111                    
144    220    90    10010000                    
145    221    91    10010001    ‘    ‘    ‘    Left single quotation mark
146    222    92    10010010    ’    ’    ’    Right single quotation mark
147    223    93    10010011    “    “    “    Left double quotation mark
148    224    94    10010100    ”    ”    ”    Right double quotation mark
149    225    95    10010101    •    •    •    Bullet
150    226    96    10010110    –    –    –    En dash
151    227    97    10010111    —    —    —    Em dash
152    230    98    10011000    ˜    ˜    ˜    Small tilde
153    231    99    10011001    ™    ™    ™    Trade mark sign
154    232    9A    10011010    š    š    š    Latin small letter S with caron
155    233    9B    10011011    ›    ›    ›     Single right-pointing angle quotation mark
156    234    9C    10011100    œ    œ    œ    Latin small ligature oe
157    235    9D    10011101                    
158    236    9E    10011110    ž    ž         Latin small letter z with caron
159    237    9F    10011111    Ÿ    Ÿ    ÿ    Latin capital letter Y with diaeresis
160    240    A0    10100000                   Non-breaking space
161    241    A1    10100001    ¡    ¡    ¡    Inverted exclamation mark
162    242    A2    10100010    ¢    ¢    ¢    Cent sign
163    243    A3    10100011    £    £    £    Pound sign
164    244    A4    10100100    ¤    ¤    ¤    Currency sign
165    245    A5    10100101    ¥    ¥    ¥    Yen sign
166    246    A6    10100110    ¦    ¦    ¦    Pipe, Broken vertical bar
167    247    A7    10100111    §    §    §    Section sign
168    250    A8    10101000    ¨    ¨    ¨    Spacing diaeresis - umlaut
169    251    A9    10101001    ©    ©    ©    Copyright sign
170    252    AA    10101010    ª    ª    ª    Feminine ordinal indicator
171    253    AB    10101011    «    «    «    Left double angle quotes
172    254    AC    10101100    ¬    ¬    ¬    Not sign
173    255    AD    10101101    *    *    *    Soft hyphen
174    256    AE    10101110    ®    ®    ®    Registered trade mark sign
175    257    AF    10101111    ¯    ¯    ¯    Spacing macron - overline
176    260    B0    10110000    °    °    °    Degree sign
177    261    B1    10110001    ±    ±    ±    Plus-or-minus sign
178    262    B2    10110010    ²    ²    ²    Superscript two - squared
179    263    B3    10110011    ³    ³    ³    Superscript three - cubed
180    264    B4    10110100    ´    ´    ´    Acute accent - spacing acute
181    265    B5    10110101    µ    µ    µ    Micro sign
182    266    B6    10110110    ¶    ¶    ¶    Pilcrow sign - paragraph sign
183    267    B7    10110111    ·    ·    ·    Middle dot - Georgian comma
184    270    B8    10111000    ¸    ¸    ¸    Spacing cedilla
185    271    B9    10111001    ¹    ¹    ¹    Superscript one
186    272    BA    10111010    º    º    º    Masculine ordinal indicator
187    273    BB    10111011    »    »    »    Right double angle quotes
188    274    BC    10111100    ¼    ¼    ¼    Fraction one quarter
189    275    BD    10111101    ½    ½    ½    Fraction one half
190    276    BE    10111110    ¾    ¾    ¾    Fraction three quarters
191    277    BF    10111111    ¿    ¿    ¿    Inverted question mark
192    300    C0    11000000    À    À    À    Latin capital letter A with grave
193    301    C1    11000001    Á    Á    Á    Latin capital letter A with acute
194    302    C2    11000010    Â    Â    Â    Latin capital letter A with circumflex
195    303    C3    11000011    Ã    Ã    Ã    Latin capital letter A with tilde
196    304    C4    11000100    Ä    Ä    Ä    Latin capital letter A with diaeresis
197    305    C5    11000101    Å    Å    Å    Latin capital letter A with ring above
198    306    C6    11000110    Æ    Æ    Æ    Latin capital letter AE
199    307    C7    11000111    Ç    Ç    Ç    Latin capital letter C with cedilla
200    310    C8    11001000    È    È    È    Latin capital letter E with grave
201    311    C9    11001001    É    É    É    Latin capital letter E with acute
202    312    CA    11001010    Ê    Ê    Ê    Latin capital letter E with circumflex
203    313    CB    11001011    Ë    Ë    Ë    Latin capital letter E with diaeresis
204    314    CC    11001100    Ì    Ì    Ì    Latin capital letter I with grave
205    315    CD    11001101    Í    Í    Í    Latin capital letter I with acute
206    316    CE    11001110    Î    Î    Î    Latin capital letter I with circumflex
207    317    CF    11001111    Ï    Ï    Ï    Latin capital letter I with diaeresis
208    320    D0    11010000    Ð    Ð    Ð    Latin capital letter ETH
209    321    D1    11010001    Ñ    Ñ    Ñ    Latin capital letter N with tilde
210    322    D2    11010010    Ò    Ò    Ò    Latin capital letter O with grave
211    323    D3    11010011    Ó    Ó    Ó    Latin capital letter O with acute
212    324    D4    11010100    Ô    Ô    Ô    Latin capital letter O with circumflex
213    325    D5    11010101    Õ    Õ    Õ    Latin capital letter O with tilde
214    326    D6    11010110    Ö    Ö    Ö    Latin capital letter O with diaeresis
215    327    D7    11010111    ×    ×    ×    Multiplication sign
216    330    D8    11011000    Ø    Ø    Ø    Latin capital letter O with slash
217    331    D9    11011001    Ù    Ù    Ù    Latin capital letter U with grave
218    332    DA    11011010    Ú    Ú    Ú    Latin capital letter U with acute
219    333    DB    11011011    Û    Û    Û    Latin capital letter U with circumflex
220    334    DC    11011100    Ü    Ü    Ü    Latin capital letter U with diaeresis
221    335    DD    11011101    Ý    Ý    Ý    Latin capital letter Y with acute
222    336    DE    11011110    Þ    Þ    Þ    Latin capital letter THORN
223    337    DF    11011111    ß    ß    ß    Latin small letter sharp s - ess-zed
224    340    E0    11100000    à    à    à    Latin small letter a with grave
225    341    E1    11100001    á    á    á    Latin small letter a with acute
226    342    E2    11100010    â    â    â    Latin small letter a with circumflex
227    343    E3    11100011    ã    ã    ã    Latin small letter a with tilde
228    344    E4    11100100    ä    ä    ä    Latin small letter a with diaeresis
229    345    E5    11100101    å    å    å    Latin small letter a with ring above
230    346    E6    11100110    æ    æ    æ    Latin small letter ae
231    347    E7    11100111    ç    ç    ç    Latin small letter c with cedilla
232    350    E8    11101000    è    è    è    Latin small letter e with grave
233    351    E9    11101001    é    é    é    Latin small letter e with acute
234    352    EA    11101010    ê    ê    ê    Latin small letter e with circumflex
235    353    EB    11101011    ë    ë    ë    Latin small letter e with diaeresis
236    354    EC    11101100    ì    ì    ì    Latin small letter i with grave
237    355    ED    11101101    í    í    í    Latin small letter i with acute
238    356    EE    11101110    î    î    î    Latin small letter i with circumflex
239    357    EF    11101111    ï    ï    ï    Latin small letter i with diaeresis
240    360    F0    11110000    ð    ð    ð    Latin small letter eth
241    361    F1    11110001    ñ    ñ    ñ    Latin small letter n with tilde
242    362    F2    11110010    ò    ò    ò    Latin small letter o with grave
243    363    F3    11110011    ó    ó    ó    Latin small letter o with acute
244    364    F4    11110100    ô    ô    ô    Latin small letter o with circumflex
245    365    F5    11110101    õ    õ    õ    Latin small letter o with tilde
246    366    F6    11110110    ö    ö    ö    Latin small letter o with diaeresis
247    367    F7    11110111    ÷    ÷    ÷    Division sign
248    370    F8    11111000    ø    ø    ø    Latin small letter o with slash
249    371    F9    11111001    ù    ù    ù    Latin small letter u with grave
250    372    FA    11111010    ú    ú    ú    Latin small letter u with acute
251    373    FB    11111011    û    û    û    Latin small letter u with circumflex
252    374    FC    11111100    ü    ü    ü    Latin small letter u with diaeresis
253    375    FD    11111101    ý    ý    ý    Latin small letter y with acute
254    376    FE    11111110    þ    þ    þ    Latin small letter thorn
255    377    FF    11111111    ÿ    ÿ    ÿ    Latin small letter y with diaeresis
AS