Mr. Wakasugi is my best friend.

Mr. Sugimura is my best friend.

His actions are nothing more than a misunderstanding.

He is an expert in systems engineering.

Our school has introduced a new PA system.

The filesystem of my computer has broken down.

The automotive navigation system in my car has downloaded the latest map data.

Geographic Information Systems are very useful tools for map making and spatial data analysis.

This 'Ra' shirt is very light.

Natural language understanding is an important field of artificial intelligence.