You can hyperlink in Gmail on a computer or mobile device, though the desktop shortcuts for it aren't available on the mobile app.

Hyperlinking in Google Docs can be incredibly useful for linking not only to external websites, but also to other Google Docs ...

But why can't any real-world object -- with or without a code -- be enriched by virtual information, accessible through a cell phone screen, a visor, or, looking even further into the future, ...