The A-121 Plotter, an astrogation plotter model, was created and produced by Republic Sienar Systems in the era of the Galactic Republic. As the Galactic Civil War approached, the A-121 Plotter had become outdated due to the advancements in contemporary navigation computers. Should it be necessary to use it in a pinch, computing a hyperspace jump would take five times longer, and it would be necessary to use a cobbled-together personal computer or datapad to transfer the coordinates to the hyperdrive's motivator.