He finished the job in a short span of time.

He was able to solve the complex calculation quickly.

He was calculating in his head.

The development of quantum computers has the potential to greatly exceed current computing capabilities.

I like playing computer games.

He loves playing computer games.

My personal computer is installing the latest software.

My new palmtop computer is very convenient.

Research on quantum computers has just begun.

My computer got infected with a computer virus.