But now that development frenzy has reached even the shores of this unusual street, it remains to be seen how long three centuries of architecture can happily co-exist.

In other words, PCs will happily co-exist with mobile devices like tablets for the time being.

We co-exist with them-not always happily, not always peacefully.

For all practical purposes, both programs are free, and both can co-exist happily on the same hard disk.

Mr. Kopelman disputes the proposal that the two Fifth Avenues - the one of mass and the other of class - cannot happily co-exist.

Is America right to be wary of the emerging superpower or can the two economic and military giants co-exist happily?

Craig's relationship with Becky stops her from harassing Kevin and allows the couples to happily co-exist.

All these actors and characters happily co-exist in reruns.

But both these sectors happily co-exist - and both are flourishing.

Now Microsoft says that DOS and OS/2 will co-exist happily for years to come.