In a combat situation, the delay caused by locking time can settle even the fiercest battle, so it's important to start locking your enemies as fast as you can, and store them in your targeting computer.
The targeting computer stores all the landmarks which you have locked as a target. Each robot's targeting computer has a different capacity - the more advanced the robots is, the more targets you can store.
You can reach some basic movement options (approach, clear target, etc.) through the targeting computer, just right-click on a target.