Palm OS Cobalt, version 6.0 of Palm OS

Cobalt, the chemical element

Cobalt, Connecticut

Chevrolet Cobalt, the automobile

Cobalt, Ontario

Cobalt (color)

Cobalt, Missouri

Cobalt Networks, a computer hardware company

Co-Balt, the second studio album by the band "brute."

Cobalt (magazine), a shōjo fiction magazine published in Japan

Cobalt, Idaho

Cobalt RaQ or Cobalt Qube, computer server appliances made by that company