C1 controls

File Format
Name	C1 controls
Ontology	Electronic File Formats Character Encodings C1 controls

The C1 controls are the control characters (code positions 128-159 decimal) which are defined by ISO/IEC 6429:1992 and are part of the ISO-8859 and other encodings. They are not often used, and in otherwise equivalent Microsoft character sets (e.g., Windows 1252) they are replaced by printing characters. Because of their rarity of use, there is little agreement on their exact meaning and implementation.

Hex	Dec	Abbreviation	Name	Description and uses
80	128	PAD	Padding Character	Not part of ISO/IEC 6429.
81	129	HOP	High Octet Preset	Not part of ISO/IEC 6429.
82	130	BPH	Break Permitted Here	Follows a graphic character where a line break is permitted.
83	131	NBH	No Break Here	Follows a graphic character where a line break is not permitted.
84	132	IND	Index	Moves the active position one line down.
85	133	NEL	Next Line	Yet another line ending.
86	134	SSA	Start of Selected Area
87	135	ESA	End of Selected Area
88	136	HTS	Horizontal Tabulation Set	Sets a horizontal tab stop.
89	137	HTJ	Horizontal Tabulation with Justification	Sets a horizontal tab stop and indicates text should be justified out to the stop.
8A	138	VTS	Vertical Tabulation Set	Sets a vertical tab stop.
8B	139	PLD	Partial Line Down	Moves the active position down to a position suitable for subscripts, or undoes PLU.
8C	140	PLU	Partial Line Up	Moves the active position up to a position suitable for superscripts, or undoes PLD.
8D	141	RI	Reverse Index	Moves the active position one line up.
8E	142	SS2	Single-Shift 2	Indicates that the next code only should be interpreted in the G2 character set.
8F	143	SS3	Single-Shift 3	Indicates that the next code only should be interpreted in the G3 character set.
90	144	DCS	Device Control String	Introduces a device control sequence, which is terminated by ST (0X9C).
91	145	PU1	Private Use 1
92	146	PU2	Private Use 2
93	147	STS	Set Transmit State
94	148	PCH	Cancel Character	Backspace and cancel the previous character.
95	149	MW	Message Waiting
96	150	SPA	Start of Protected Area
97	151	EPA	End of Protected Area
98	152	SOS	Start of String	Introduces a control string, which is terminated by ST (0X9C).
99	153	SGCI	Single Graphic Character Introducer	Not part of ISO/IEC 6429.
9A	154	SCI	Single Character Introducer	Followed by a single printing character or format effector. Meaning uncertain.
9B	155	CSI	Control Sequence Introducer
9C	156	ST	String Terminator	Marks the end of control sequences introduced by several C1 codes.
9D	157	Operating System Command	Introduces an operating system command, which is terminated by ST (0X9C).
9E	158	PM	Privacy Message	Introduces a privacy message, which is terminated by ST (0X9C).
9F	159	APC	Application Program Command	Introduces an application program command, which is terminated by ST (0X9C).