The Bell System performed 1000s of hours of human factors research to arrive at the dialing system and the direct dial service. There is so much we can learn from this amazing research that still applies today. Grandpa loved the new fangled technology: “Yep, that’s the noise” https://twitter.com/BrianRoemmele/status/1195147610090115072 …pic.twitter.com/CTLHUHhjX7
5:53 PM - 14 Nov 2019
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