Graphical user interfaces are widely used in modern software applications.

The user charge for the service is $10 per month.

The user charges for the service are increasing.

Usenetters are active participants in online discussion forums.

Our userbase has grown significantly over the past year.

The company has a large userbase of over 10 million users.

I met a Usenetter at the conference.

User agents are software applications that act on behalf of users in accessing and interacting with websites.

This app is the user-friendliest one I've ever used.

This new software update makes the interface much more user-friendlier.