Stanford/ITS character set

Stanford/ITS character set is an extended ASCII character set based on SEASCII with modifications allowing compatibility with 1968 ASCII.[2]

Stanford/ITS character set

Stanford/ITS character set code page layout
Language(s)	English
Created by	MIT[1]
Definitions	RFC 734
Classification	Extended ASCII
Extends	US-ASCII
Based on	SEASCII[2]

Usage

It is used as an alternate character set of the SUPDUP protocol for terminals with %TOSAI and %TOFCI bits set.[2] It is also recommended for TeX implementations on systems with large character sets.[1] The default plain TeX macro package sets values B₁₆ (↑) and 1₁₆ (↓) as alternative character codes for superscripts and subscripts, respectively (the default being ^ and _).[3]

The Knight keyboard is an example of a keyboard capable of inputting all of the defined characters excluding ⋅γδ±⊕◊∫, as they are mapped to ASCII commands NUL, HT, LF, FF, CR, ESC and DEL, respectively.

Coverage

Each character is encoded as a single seven-bit code value. It contains all 95 printable ASCII characters along with 27 mathematical symbols and 6 Greek letters.

Code page layout

Stanford/ITS character set

	_0	_1	_2	_3	_4	_5	_6	_7	_8	_9	_A	_B	_C	_D	_E	_F
0_	⋅ 22C5	↓ 2193	α 03B1	β 03B2	∧ 2227	¬ 00AC	∈ 2208	π 03C0	λ 03BB	γ 03B3	δ 03B4	↑ 2191	± 00B1	⊕ 2295	∞ 221E	∂ 2202
1_	⊂ 2282	⊃ 2283	∩ 2229	∪ 222A	∀ 2200	∃ 2203	⊗ 2297	⇆ 21C6	← 2190	→ 2192	≠ 2260	◊ 25CA	≤ 2264	≥ 2265	≡ 2261	∨ 2228
2_	SP 0020	! 0021	" 0022	# 0023	$ 0024	% 0025	& 0026	' 0027	( 0028	) 0029	* 002A	+ 002B	, 002C	- 002D	. 002E	/ 002F
3_	0 0030	1 0031	2 0032	3 0033	4 0034	5 0035	6 0036	7 0037	8 0038	9 0039	: 003A	; 003B	< 003C	= 003D	> 003E	? 003F
4_	@ 0040	A 0041	B 0042	C 0043	D 0044	E 0045	F 0046	G 0047	H 0048	I 0049	J 004A	K 004B	L 004C	M 004D	N 004E	O 004F
5_	P 0050	Q 0051	R 0052	S 0053	T 0054	U 0055	V 0056	W 0057	X 0058	Y 0059	Z 005A	[ 005B	\ 005C	] 005D	^ 005E	_ 005F
6_	` 0060	a 0061	b 0062	c 0063	d 0064	e 0065	f 0066	g 0067	h 0068	i 0069	j 006A	k 006B	l 006C	m 006D	n 006E	o 006F
7_	p 0070	q 0071	r 0072	s 0073	t 0074	u 0075	v 0076	w 0077	x 0078	y 0079	z 007A	{ 007B	| 007C	} 007D	~ 007E	∫ 222B

  Letter   Number   Punctuation   Symbol   Other   Undefined

See also

• Stanford Extended ASCII
• Incompatible Timesharing System
• SUPDUP
• TeX

References

1. Knuth, Donald (1986). "Appendix C: Character Codes". The TeXbook (PDF). Reading, Massachusetts: Addison-Wesley. p. 369. ISBN 0201134470.
2. Crispin, Mark (October 1977). "Stanford/ITS character set". SUPDUP Protocol. IETF. p. 12. doi:10.17487/RFC0734. RFC 734. Retrieved February 18, 2019.
3. Knuth, Donald (1986). "Appendix B: Basic Control Sequences". The TeXbook (PDF). Reading, Massachusetts: Addison-Wesley. p. 343. ISBN 0201134470.

Further reading

• RFC 734 - (Historic) SUPDUP Protocol. October 1977.