#### 3.8.1 Basic Usage for `prs`

Here are some examples of the use of prs, with explanations of what they do.

‘`prs s.myfile.c`’

  Show information about all the versions of `myfile.c`.

‘`prs SCCS`’

  Show information about all the SCCS files in the directory `SCCS`.

‘`prs -e -d:P: s.main.c | sort -u`’

  Show which users have made changes to main.c.

‘`prs -l -c`date +%y%m%d --date "last week"` SCCS`’

  Examine all the SCCS files in the directory `SCCS`. Show any deltas that have been created since last week.