Excerpt from this article:
Imagine working on a multistep reaction that requires you to add reagents in a specific sequence and with precise timing. Standing at the hood, reagents measured and ready to go, you begin the carefully orchestrated procedure, when suddenly your mind draws a blank. Which reagent do you add next?
You could take off your gloves and look up the protocol in your lab notebook, but with each precious second that passes, the reaction is more likely to fail. Then you remember your lab assistant—a black cylinder sitting on a shelf across the lab. “Alexa, ask Helix for the protocol for the coupling reaction,” you say. A ring on top of the cylinder glows blue as Alexa rattles off the correct order of addition. Crisis averted.