This software has forward compatibility.

This software has compatibility with other programs.

There was a beautiful sea spread out in front.

I installed new software.

Education about sex is very important.

This software maintains backward compatibility.

This new software has backward compatibility, so you can use old version data without any problems.

These two software have complete interchangeability.

This new software maintains upward compatibility with the old version.

These two parts have interchangeability.