For the combat holoprogram, please see Odo 1.
Odo One was a special computer program created by Doctor Julian Bashir and Constable Odo on aboard Deep Space 9 in 2369. The program was designed to remove the telepathic field from humanoids affected by the Saltah'na energy spheres.
The program generated an ionic interference signal with the natural resonance frequencies of the field. When Odo executed the program in cargo bay 4, the signal locked on to the resonance frequencies and drove the field out of the brains of the humanoids affected. (DS9: "Dramatis Personae")