@findex lpr-region
@vindex lpr-switches
@vindex lpr-commands
- On most operating system, the above hardcopy commands submit files
+ On most operating systems, the above hardcopy commands submit files
for printing by calling the @command{lpr} program. To change the
printer program, customize the variable @code{lpr-command}. To
specify extra switches to give the printer program, customize the list