Two kids in blue Digital Harbor t-shirts had slipped behind the control panel while the 92Q DJ was away, and cued up their own music.

FORBES: Commandeering the Decks: Baltimore's Digital Harbor Tech Center

So, already the PDJ will be familiar in set-up to any DJ who picks it up (something the Pacemaker couldn't claim with its proprietary interface).

ENGADGET

The 23-year-old DJ released "Harlem Shake" last May, but it wasn't until Feb. 2 that the first video emerged featuring a silly dance to the song. (A YouTube denizen known as Filthy Frank gets that credit.) A version by a crew of Australian skateboarders established the jump-cut blueprint, and an entry by employees of Maker Studios, a digital media company, inspired other office imitators.

WSJ: Why the Harlem Shake Matters