DESCRIPTION
 The 
nroff script emulates the 
nroff command using groff. Only 
ascii, 
latin1, 
utf8, and 
cp1047 are valid arguments for the 
-T option, selecting the output encoding emitted by 
grotty, groff's TTY output device. If an invalid or no 
-T option is given, 
nroff checks the current locale to select a default output device. It first tries the 
locale program, then the environment variables 
LC_ALL, 
LC_CTYPE, and 
LANG, and finally the 
LESSCHARSET environment variable.
The -h and -c options are equivalent to grotty's options -h (using tabs in the output) and -c (using the old output scheme instead of SGR escape sequences). The -d, -C, -i, -M, -m, -n, -o, and -r options have the effect described in troff(1). In addition, nroff silently ignores the options -e, -q, and -s (which are not implemented in troff). Options -p (pic), -t (tbl), -S (safer), and -U (unsafe) are passed to groff. -v shows the version number.