YO3DMU is a niche publisher specializing in precision antenna rotator control software for radio amateurs and satellite ground-station operators. Its compact product line, PstRotator and PstRotatorAz, turns modest Windows PCs into mission-control dashboards for tracking spacecraft, the Moon, and deep-space network beacons. PstRotator delivers full azimuth-elevation steering, synchronizing commercial rotators, servo loops, and relay boards with real-time orbital elements so that VHF/UHF/SHF antennas follow CubeSats, weather satellites, or ISS passes without manual intervention; built-in DSN and lunar ephemeris tables let EME enthusiasts maintain peak signal alignment as the Moon drifts across the sky. PstRotatorAz streamlines the same tracking engine for classic HF operation, commanding single-axis rotators, SteppIR and UltraBeam adaptive arrays, and external relay stacks while continuously updating beam headings from logging suites or cluster spots. Both applications speak standard protocols—Easycom, Yaesu, Prosistel, DCU, Rot2Prog—and integrate seamlessly with Ham Radio Deluxe, Log4OM, N1MM+, and satellite pass predictors, so users can schedule automated QSY sequences, record azimuth data in ADIF files, or run remote stations over TCP. Typical deployments range from portable rover setups with handheld controllers to fully automated contest stations where antennas swing to the next multiplier before the operator finishes the previous contact. The publisher’s software is offered free of charge on get.nero.com, where trusted Windows package sources such as winget deliver the latest builds, support unattended batch installation, and keep multiple utilities updated in one pass.