[wesamco]

The logo SUN Microsystems had is a 4-way ambigram with rotational symmetries. Designed by Professor Vaughan Pratt of Stanford, the logo features 4 interleaved copies of the word "sun", forming a rotationally symmetric ambigram, with the letters U and N in each word forming the letter S for the next word. You can read the word "sun" if you rotate your head by 45°, 135°, 225°, or 315°.

* Objectively according to me. :P

[ChrisGranger]

It reminds me of Columbia Sportswear's logo [0] but it's cleverer. There's a third logo that reminds me of both of those but I've forgotten whose it was...

[0] https://en.wikipedia.org/wiki/Columbia_Sportswear#/media/Fil...

[jonathankoren]

I wonder if rotating each quadrant by 90 degrees was an effort to avoid trademark confusion.

Also, I would have liked some Sun swag from Columbia.

[cosmotic]

Wow, now that you pointed it out, I just saw the "un" part of that. Until now, I just thought it was four 'S's.