Appendix D ASCII Codes

This table summarizes the first 127 standard ASCII codes. It does not cover extended ASCII codes (above 127 in value) or the wide (16-bit) character set. In this table, a two- or three-digit number specifies a numeric value; the box immediately to its right shows the corresponding character.

Some of these characters are special (unprintable) characters. They include:

NUL—null value

ACK—acknowledgement signal (used by network communications)

BEL—bell

BS—backspace

LF—linefeed

FF—form feed (new page)

CR—carriage return

NAK—no acknowledgement

DEL—delete

Table D1: ASCII Codes

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