Two-axis antenna or telescope pointing can be done by motor-controlled actuators. Amateur radio operators commonly use the Yaesu G-5400B
dual-axis rotor to point their antennas, tracking a satellite across the sky.
This rotor's controller box has an 8-pin DIN plug in the back for remote control. This plug allows you to interface the controller with a computer for automatic control by satellite tracking software.
There are a variety of commercial and kit interfaces for the Yaesu G-5400B (see listing under The Station Program on the satellite tracking software page) and ZL2AMD's UNI_TRAC 2000 universal tracking system for amateur radio satellites.
I use a "home brew" interface called the "FODtrack" (after its designer whose amateur radio call sign is XQ2FOD).
The FODtrack interfaces through the computer's parallel (printer) port.
I built my first FODtrack interface on a perforated board with foil pads on the reverse side. The completed interface board is shown below.