While many of those 35 control characters were similar to those of modern ASCII, some were different.

CR, LF, ESC, CAN.

Should I care about them This is an in-depth look into control characters in ASCII and its descendants, including Unicode, ANSI and ISO standards.

Since then, many new character sets and standards have been published.

What happened to the control characters Are they still used and if yes, for what.

The information is based on a number of standards released by ANSI, ISO, ECMA and The Unicode Consortium, as well as industry practice.

In many cases, the standards define one use for a character, but common practice is different.

In addition, certain characters were originally defined in an ambiguous or loose way, which has resulted in confusion in their use.

The rest of the article lists all the control characters in detail.

The ASCII control character area covers code positions 031 (hex 001F).

Two additional controls appear at 32 and 127 (hex 20 and 7F).

The ASCII control characters cover a wide range of uses, such as text layout, transmission and device control, and more.

More.

This set is related to ANSI escape sequences and VT100.

In them, a part of the standard C0C1 controls have been deleted or replaced by new controls.

Alternative control characters are not discussed in this article.

One can find them in the International Register of Coded Character Sets.

These characters consist of a set called C0 and two additional characters.

Two additional ASCII characters, SP and DEL, fall outside the C0 area, but they are closely related to the C0 set.

There are Format Effectors that control the appearance of plain text.

There are Transmission Controls for use with transmission protocols and Device Controls to start, operate and stop auxiliary devices.

There are Information Separators that delimit various pieces of data.

Other controls exist for producing alerts, filling a media, indicating end of media, and for dealing with errors.

There are even controls to create new characters and controls.

Devices have changed since then, but the C0 controls have survived.

Like the ASCII of today, the 1963 version covered some letters and symbols, as well as control characters.

Ascii Control Characters For Mac Keyboard