Here's an interesting keyboard from ebay. It's a Hitachi Limelight 2020. https://www.ebay.com/itm/Vintage-Interfield-Hitachi-Limelight-2020-Keyboard-From-Portable-Workstation/174003125869 …pic.twitter.com/Lge9lcduDX
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The alternative? The second set is just a visual representation of Home/End/PgUp/PgDn or Line Home/Line End/Document Home/Document End.
In the same way every 101 key keyboard also has two sets of arrow keys, except one is with text labels and with (Insert and) Delete thrown in.
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