In Yamatai, computers are generally using four types of user input, by order of commonality:
1. Direct wireless link (no hands required). Tell the refrigerator to CRUSH THE ICE, WITH YOUR MIND.
2. Touch screens. Old but reliable. Popular with non-digital-minded species who have fingers.
3. Volumetric projections
4. Voice commands, interpreted by AI
Note that wirelessly connected equipment may use augmented reality interfaces.
Some devices may be featureless, as they are intended to be connected via AR by both humanoids and species that don't have hands. The Type 36 communicator is one such example.