Sekula's principal medium is photography, which he employs to create exhibitions, books, and films.

The sessions are the principal medium for the work of the State Council and are held four times a year without a rigid timetable.

Throughout the 1930s and 1940s, his work continued to alternate between two principal mediums, bronze and stoneware.

The Bureau plans to use the Internet as its principal medium for releasing data from the 2000 Census.

Because songs, not things, are the principal medium of exchange.

Digital has become the principal medium to create, distribute and store content, from text to motion pictures to recorded sound.

For the most part, the work is deployed outside the building, appropriately, for the sculptor's principal medium is dead wood.

Painting, ceramics and textiles are the principal manual artistic mediums.

Oil paint eventually became the principal medium used for creating artworks as its advantages became widely known.

Occasionally a work in oil becomes available at auction but his principal medium was watercolor.