For some reason, I just remembered that OS/2 put window tabs on the side. Though looking at a screenshot now [1], I didn't remember it was done in a skeuomorphi

For some reason, I just remembered that OS/2 put window tabs on the side. Though looking at a screenshot now [1], I didn't remember it was done in a skeuomorphic, 3D way, which definitely takes away from their usefulness. Still, what's old is new again. 1. https://files.support.epson.com/htmldocs/c82422/c82422rf/images/os_2.gif https://files.support.epson.com/htmldocs/c82422/c82422rf/ima...