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Despite tech-savvy reputation, Gen Z falls behind in keyboard typing skills
(www.techspot.com)
This is a most excellent place for technology news and articles.
There are a wide range of computer skills. Being able to interact with a word processor extremely efficiently is a highly valuable tech skill. Someone who knows about processor architecture but can't touch type is arguably more tech-savvy but also less useful in most office jobs. So I'd say that the secretaries were indeed tech-savvy in a way that was useful for their positions.