I used a Univac keypunch machine, I think in the 1970s, that had an electromechanical noisemaker (a large relay?) that made a clacking sound as each keyboard key was pressed. This machine accepted an entire line of text before punching the card, unlike IBM keypunches, that punched the card column-by-column as it was entered. The conventional wisdom as I recall was that someone familiar with typewriters could not type accurately without the audible feedback.
In some laptops, possibly all in current production, the keyboard is connected by a flexible flat cable. The cables I've seen have 24 conducting lines. The ribbon and connector could be standardized now. No mention of this connection under Connection types. If someone can write about it, good. Thanks, ... PeterEasthope (talk) 18:20, 28 September 2018 (UTC)