KOI7

KOI7 is a 7-bit character encoding, designed to cover Russian, which uses the Cyrillic alphabet.

In Russian, KOI7 stands for Kod Obmena Informatsiey, 7 bit (Код Обмена Информацией, 7 бит) which means "Code for Information Exchange, 7 bit".

Shift Out (SO) and Shift In (SI) control characters are used in KOI7, where SO starts printing Russian letters, and SI starts printing Latin letters again, or for lowercase and uppercase switching.

Codepage layout

KOI7
	—0	—1	—2	—3	—4	—5	—6	—7	—8	—9	—A	—B	—C	—D	—E	—F
0_	NUL 0000 0	SOH 0001 1	STX 0002 2	ETX 0003 3	EOT 0004 4	ENQ 0005 5	ACK 0006 6	BEL 0007 7	BS 0008 8	HT 0009 9	LF 000A 10	VT 000B 11	FF 000C 12	CR 000D 13	SO 000E 14	SI 000F 15
1_	DLE 0010 16	DC1 0011 17	DC2 0012 18	DC3 0013 19	DC4 0014 20	NAK 0015 21	SYN 0016 22	ETB 0017 23	CAN 0018 24	EM 0019 25	SUB 001A 26	ESC 001B 27	FS 001C 28	GS 001D 29	RS 001E 30	US 001F 31
2_	SP 0020 32	! 0021 33	" 0022 34	# 0023 35	$ 0024 36	% 0025 37	& 0026 38	' 0027 39	( 0028 40	) 0029 41	* 002A 42	+ 002B 43	, 002C 44	- 002D 45	. 002E 46	/ 002F 47
3_	0 0030 48	1 0031 49	2 0032 50	3 0033 51	4 0034 52	5 0035 53	6 0036 54	7 0037 55	8 0038 56	9 0039 57	: 003A 58	; 003B 59	< 003C 60	= 003D 61	> 003E 62	? 003F 63
4_	@ 0040 64	A 0041 65	B 0042 66	C 0043 67	D 0044 68	E 0045 69	F 0046 70	G 0047 71	H 0048 72	I 0049 73	J 004A 74	K 004B 75	L 004C 76	M 004D 77	N 004E 78	O 004F 79
5_	P 0050 80	Q 0051 81	R 0052 82	S 0053 83	T 0054 84	U 0055 85	V 0056 86	W 0057 87	X 0058 88	Y 0059 89	Z 005A 90	[ 005B 91	\ 005C 92	] 005D 93	^ 005E 94	_ 005F 95
6_	Ю 042E 96	А 0410 97	Б 0411 98	Ц 0426 99	Д 0414 100	Е 0415 101	Ф 0424 102	Г 0413 103	Х 0425 104	И 0418 105	Й 0419 106	К 041A 107	Л 041B 108	М 041C 109	Н 041D 110	О 041E 111
7_	П 041F 112	Я 042F 113	Р 0420 114	С 0421 115	Т 0422 116	У 0423 117	Ж 0416 118	В 0412 119	Ь 042C 120	Ы 042B 121	З 0417 122	Ш 0428 123	Э 042D 124	Щ 0429 125	Ч 0427 126	DEL 007F 127

The dollar sign character ("$" hex 24), however, was often replaced with the universal currency sign "¤" in Soviet computers. A popular legend has it that this was to demonstrate independence of the American-dominated computer industry — which was ironic, since a significant number of Soviet computers were actually implementations of various American designs.

See also

• KOI8-R
• KOI8-U
• Windows-1251