They said: "Arq keeps multiple versions of your files, a backup history.

Keeps old versions for up to three months.

Versioning, the ability to keep multiple older versions of each file in the backup.

Usually later versions will either completely supersede or incorporate earlier versions, so there is generally no point in keeping old versions around.

Keep liquids in check and drink water or light versions of your favorite quenchers.

Sometimes, an operator would keep multiple versions of a program around, each built for a different load address, to expand his options.

Let's not forget that Java likes to keep older versions around, and programs (malware) can request to specifically run on an older version.

It would keep older versions installed because a program could request to use a specific version of Java.

They say that it keeps unlimited versions of friend-shared files.

Court cases established the right of companies like Bayer to extend their monopolies on patented drugs by keeping cheaper generic versions off the market.