HP 48GX Character Set

[Thomas Okken]

From https://en.m.wikipedia.org/wiki/Control_character

The control characters in ASCII still in common use include:

0 (null, NUL, \0, ^@), originally intended to be an ignored character, but now used by many programming languages including C to mark the end of a string.
7 (bell, BEL, \a, ^G), which may cause the device to emit a warning such as a bell or beep sound or the screen flashing.
8 (backspace, BS, \b, ^H), may overprint the previous character.
9 (horizontal tab, HT, \t, ^I), moves the printing position right to the next tab stop.
10 (line feed, LF, \n, ^J), moves the print head down one line, or to the left edge and down. Used as the end of line marker in most UNIX systems and variants.
11 (vertical tab, VT, \v, ^K), vertical tabulation.
12 (form feed, FF, \f, ^L), to cause a printer to eject paper to the top of the next page, or a video terminal to clear the screen.
13 (carriage return, CR, \r, ^M), moves the printing position to the start of the line, allowing overprinting. Used as the end of line marker in Classic Mac OS, OS-9, FLEX (and variants). A CR+LF pair is used by CP/M-80 and its derivatives including DOS and Windows, and by Application Layer protocols such as FTP, SMTP, and HTTP.
26 (Control-Z, SUB, EOF, ^Z). Acts as an end-of-file for the Windows text-mode file i/o.
27 (escape, ESC, \e (GCC only), ^[). Introduces an escape sequence.