Bloomberg has also provided some additional details about how the program works. Developers from Facebook, Twitter, Instagram, Pinterest, Starwood Hotels & Resorts, and more have been given a chance to take part in these workshops to perfect their software ahead of the official Apple Watch launch.

Despite having already shown the device publicly and released development tools to software makers, Apple is keeping things pretty tight-lipped. The workshop is reportedly being held in a secret lab at Apple HQ, and participants are barred from bringing so much as “a pad of paper” into the room.

In fact, developers are only allowed to bring in one item at all: a hard drive containing the source code for their applications. Apple is so strict about its security, however, that the software developers aren’t allowed to take their hard drives back out of the room. Everything has to be stored on-location by Apple. Each developer will only get their watch app source code back from Apple once the wearable is closer to launch.

Apple will show off its first wearable device next Monday at its “Spring Forward” event. The event is also expected to serve as the announcement day for iOS 8.2, and is rumored to serve as the launching pad for the 12-inch MacBook Air.