Specializes [verb]

Each volume is by an author who specializes in the topic treated.

A nuclear chemist, or radiochemist, specializes just as his name implies.

Unless one specializes, four years at college make no experts.

It is a predominance of one or another of these which classifies and specializes.

Anyone who specializes will likely be more efficient because of the mastering of skills.

The magazine is the only one in this country that specializes in practical model building.

In this definition Euclid also specializes in a manner not now generally approved.

The is called the definite article because it both individualizes and specializes.

The Alimentive specializes in desserts, the Thoracic in unusual dishes, but the Muscular wants solid fare.

Nothing, except the particular type of humanity and environment in which he specializes, seems to interest him.