The Sharp X68000 was a legendary computer in Japan, and has a similar reputation as a gaming and graphical powerhouse to the Amiga in the West. Graphics-wise, it surpassed the Amiga -- it had honest-to-goodness arcade graphics hardware allowing for 100% faithful conversions of late 80s and early 90s arcade games. There was even a Castlevania game on the X68000 that wouldn't see a release on other platforms until a PlayStation release late in that system's life.

In the first episode of Battle Programmer Shirase, a representative of "Eibin Corporation" comes to the title character asking for help with a cyberterrorist who is holding their company hostage and demanding that they bring back their "EX68" computer line (to which Shirase replies that he wishes that they would bring it back too). Note that "eibin" means "sharpness" in Japanese. That's the X68000's reputation, to the point that it warrants nerdy references in anime decades after the system's heyday.