Below sketches are the hypothetical BrainPal and Personal Data Assistant (PDA) interfaces from the fictional novel Old Man’s War.
![](http://www.interactiondesignhistory.com/2022/wp-content/uploads/2022/03/BrainPalPDA-1-781x1024.png)
Below sketches are the hypothetical BrainPal and Personal Data Assistant (PDA) interfaces from the fictional novel Old Man’s War.