More than 30 years after its debut, the NES re-entered the public consciousness when Nintendo released the NES Classic. Its return has prompted a new generation of gamers to ask some important questions, like "When will the NES be back in stock?," "They're selling for how much on eBay?," and "How do you pronounce NES anyway?" Lifehacker has the answer to that last query, and it may be different than what you expect.
This screenshot from the Japanese version of WarioWare Gold for 3DS, shared on Twitter by gamer Kyle McLain, holds a major clue to the console name's true pronunciation. Above the English abbreviation NES, Nintendo has included the Japanese characters “ne” and “su.” Together, they make what NES would sound like if it was pronounced "ness" in Japan.
That would make NES an acronym, not an initialism, but there's still some evidence in support of the latter camp. This video was shared by Twitter user Doctor_Cornelius in reply to the original Tweet, and it features a vintage American Nintendo commercial. At the 1:58 mark, the announcer can clearly be heard saying "The Power Glove for your N-E-S."
So which way is correct? Nintendo is a Japanese company, so gamers may have reason to trust the instincts of the Japanese marketers over the American ones. Either way, if you want to stick with whatever pronunciation you've been saying this whole time, the company is technically on your side.