Concurrent Versions System

$${PREV_TITLE}$

$${NEXT_TITLE}$

Who Did What? How to Undo?

Log messages
```
cvs log
```
Diffs between two revisions of a file
```
diff -u -r old.rev -r new.rev file
```
Reverting
```
cvs update -j from.rev -j to.rev file
```