Not to mention all the references to Apple, Unix, and NeXTSTEP. Such as the Whisper voice being used to speak the episode name and styling of the "To Be Continued" at the end of every episode.
Bit of a callout [0] to Be, I should think, cf. [1]. That's neither Unix nor Apple, although it's fairly close to both.
[0] http://www.wareriver.com/izzysanime/tobecontinued.jpg
[1] http://www.digibarn.com/collections/systems/bebox/Image123.j...