Trigger

Trigger is an esoteric programming language designed in 2005 by Keymaker, based on triggers, which are toggled by patterns (rows of the same character). There are four different patterns, thus four instructions. One for toggling triggers, one for conditional jumping, one for output, and one for input.

Trigger has 256 different triggers (one per each ASCII character), making the language have 256 bits of memory to use. Trigger is clearly not Turing-complete.

Computational class
Trigger is a bounded-storage machine, since it is limited to 256 bits of storage.

External resources

 * Trigger website (features the specs and programs)