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「ASCII」重定向至此。關於一家日本公司,詳見「ASCII (公司)」。
ASCII(American Standard Code for Information Interchange,美国信息交换标准代码)是基于拉丁字母的一套电脑编码系统。它主要用于显示现代英语,而其擴展版本EASCII則可以勉強顯示其他西欧语言。它是现今最通用的单字节编码系统(但是有被Unicode追上的跡象),并等同于国际标准ISO/IEC 646。
1968年版ASCII編碼速見表
ASCII第一次以規範標準的型態發表是在1967年,最後一次更新則是在1986年,至今為止共定義了128個字元;其中33個字元無法顯示(這是以現今作業系統為依歸,但在DOS模式下可顯示出一些諸如笑臉、撲克牌花式等8-bit符號),且這33個字元多數都已是陳廢的控制字元。控制字元的用途主要是用來操控已經處理過的文字。在33個字元之外的是95個可顯示的字元,包含用鍵盤敲下空白鍵所產生的空白字元也算1個可顯示字元(顯示為空白)。
目录
1 控制字符
2 可显示字符
3 缺點
4 参见
编辑 控制字符
二进制
十进制
十六进制
缩写
可以显示的表示法
名称/意义
0000 0000
0
00
NUL
␀
空字符(Null)
0000 0001
1
01
SOH
␁
标题开始
0000 0010
2
02
STX
␂
本文开始
0000 0011
3
03
ETX
␃
本文结束
0000 0100
4
04
EOT
␄
传输结束
0000 0101
5
05
ENQ
␅
请求
0000 0110
6
06
ACK
␆
確認回應
0000 0111
7
07
BEL
␇
响铃
0000 1000
8
08
BS
␈
退格
0000 1001
9
09
HT
␉
水平定位符號
0000 1010
10
0A
LF
␊
换行键
0000 1011
11
0B
VT
␋
垂直定位符號
0000 1100
12
0C
FF
␌
换页键
0000 1101
13
0D
CR
␍
Enter鍵
0000 1110
14
0E
SO
␎
取消變换(Shift out)
0000 1111
15
0F
SI
␏
启用變换(Shift in)
0001 0000
16
10
DLE
␐
跳出数据通讯
0001 0001
17
11
DC1
␑
設備控制一(XON 啟用軟體速度控制)
0001 0010
18
12
DC2
␒
設備控制二
0001 0011
19
13
DC3
␓
設備控制三(XOFF 停用軟體速度控制)
0001 0100
20
14
DC4
␔
設備控制四
0001 0101
21
15
NAK
␕
確認失敗回應
0001 0110
22
16
SYN
␖
同步用暫停
0001 0111
23
17
ETB
␗
區塊傳輸结束
0001 1000
24
18
CAN
␘
取消
0001 1001
25
19
EM
␙
連線介质中断
0001 1010
26
1A
SUB
␚
替換
0001 1011
27
1B
ESC
␛
退出键
0001 1100
28
1C
FS
␜
文件分割符
0001 1101
29
1D
GS
␝
群組分隔符
0001 1110
30
1E
RS
␞
记录分隔符
0001 1111
31
1F
US
␟
单元分隔符
0111 1111
127
7F
DEL
␡
删除
编辑 可显示字符
二进制
十进制
十六进制
图形
0010 0000
32
20
(空格)(␠)
0010 0001
33
21
!
0010 0010
34
22
"
0010 0011
35
23
#
0010 0100
36
24
$
0010 0101
37
25
%
0010 0110
38
26
&
0010 0111
39
27
'
0010 1000
40
28
(
0010 1001
41
29
)
0010 1010
42
2A
*
0010 1011
43
2B
+
0010 1100
44
2C
,
0010 1101
45
2D
-
0010 1110
46
2E
.
0010 1111
47
2F
/
0011 0000
48
30
0
0011 0001
49
31
1
0011 0010
50
32
2
0011 0011
51
33
3
0011 0100
52
34
4
0011 0101
53
35
5
0011 0110
54
36
6
0011 0111
55
37
7
0011 1000
56
38
8
0011 1001
57
39
9
0011 1010
58
3A
:
0011 1011
59
3B
;
0011 1100
60
3C
<
0011 1101
61
3D
=
0011 1110
62
3E
>
0011 1111
63
3F
?
二进制
十进制
十六进制
图形
0100 0000
64
40
@
0100 0001
65
41
A
0100 0010
66
42
B
0100 0011
67
43
C
0100 0100
68
44
D
0100 0101
69
45
E
0100 0110
70
46
F
0100 0111
71
47
G
0100 1000
72
48
H
0100 1001
73
49
I
0100 1010
74
4A
J
0100 1011
75
4B
K
0100 1100
76
4C
L
0100 1101
77
4D
M
0100 1110
78
4E
N
0100 1111
79
4F
O
0101 0000
80
50
P
0101 0001
81
51
Q
0101 0010
82
52
R
0101 0011
83
53
S
0101 0100
84
54
T
0101 0101
85
55
U
0101 0110
86
56
V
0101 0111
87
57
W
0101 1000
88
58
X
0101 1001
89
59
Y
0101 1010
90
5A
Z
0101 1011
91
5B
0101 1100
92
5C
\
0101 1101
93
5D
0101 1110
94
5E
^
0101 1111
95
5F
_
二进制
十进制
十六进制
图形
0110 0000
96
60
`
0110 0001
97
61
a
0110 0010
98
62
b
0110 0011
99
63
c
0110 0100
100
64
d
0110 0101
101
65
e
0110 0110
102
66
f
0110 0111
103
67
g
0110 1000
104
68
h
0110 1001
105
69
i
0110 1010
106
6A
j
0110 1011
107
6B
k
0110 1100
108
6C
l
0110 1101
109
6D
m
0110 1110
110
6E
n
0110 1111
111
6F
o
0111 0000
112
70
p
0111 0001
113
71
q
0111 0010
114
72
r
0111 0011
115
73
s
0111 0100
116
74
t
0111 0101
117
75
u
0111 0110
118
76
v
0111 0111
119
77
w
0111 1000
120
78
x
0111 1001
121
79
y
0111 1010
122
7A
z
0111 1011
123
7B
{
0111 1100
124
7C
|
0111 1101
125
7D
}
0111 1110
126
7E
~
编辑 缺點
ASCII的最大缺點是只能顯示26個基本拉丁字母、阿拉伯數目字和英式標點符號,因此只能用於顯示現代美國英語(而且在處理英語當中的外來詞如naïve、café、élite等等時,所有重音符號都不得不去掉,即使這樣做會違反拼寫規則)。而EASCII雖然解決了部份西歐語言的顯示問題,但對更多其他語言依然無能為力。因此現在的蘋果電腦已經拋棄ASCII而轉用Unicode。
编辑 参见
EASCII(Extended ASCII)
EBCDIC
ISO/IEC 646
ISO/IEC 8859
控制字符
ASCII艺术
ASCII絲帶行動
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