He is an expert in computer science.

He used a metal detector to search for treasure on the beach.

He is creating a newspaper using an electronic phototypesetter.

My new lawnmower is very efficient.

He is studying late into the night to learn a new computer language.

He was repairing the road using a jackhammer.

A stealth bomber has the characteristic of being difficult to detect by radar.

I bought a new dishwasher.

This rock drill is very efficient and can quickly cut through rock.

I used a futon dryer to dry the damp futon.