Disruptor array

Disruptor arrays were weapons equipped on Klingon and Romulan starships.

The first encounter of Humans with disruptor arrays was the encountering a Klingon  vessel in 2151. 

Three years later, Enterprise encountered a battle cruiser with a dorsal disruptor array. 

By 2368, the Federation was aware that Breen ships also carried disruptors. 

Romulan warbirds carried at least one disruptor array on the forward hull of the ship.