HP had several innovative GUIs of its own, before Microsoft destroyed the market with a good enough one of its own.
NewWave was its first and long predated even Windows 3.
https://en.wikipedia.org/wiki/NewWave
HP was once a UI and GUI pioneer and did other quite radical stuff.
https://en.wikipedia.org/wiki/Visual_User_Environment
TabWorks wasn't an HP thing -- it just bundled it with some consumer Compaq kit.