Internet giant Google has announced that it is set to name the next version of its Android mobile operating system KitKat.
The decision has surprised many analysts due to the firm previously indicating that the latest release was likely to be named Key Lime Pie.
KitKat's release follows previous incarnations of the system, including Android Cupcake in 2009 and the Jellybean, which is the most recent.
Marc Vanlerberghe, director of Android Marketing, said: "We couldn’t imagine a better name for our Android K release than the tasty chocolate that’s been a favourite among the team since the early days of Android."
Nestle has already announced that it plans to mark the launch of the new system with the sale of specially branded KitKat bars in a total of 19 countries, including Australia, Brazil, Germany, India, Dubai, Germany, Japan, Russia, the US and the UK.
The special promotional packs will point customers in the direction of the website android.com/kitkat, which will give them the chance to win prizes such as Google tablets and vouchers for the company's online store.
Patrice Bula, Nestlé’s head of marketing, said: "We’re excited to announce this partnership with Android, the world's most popular mobile platform, which will help us to enable even more KitKat fans to enjoy their break."
She added that KitKat's status as one of the world's top ten fast-moving consumer goods brands would allow the Swiss company to build a strong digital presence.
Despite the operation requiring plenty of resources, both companies managed to keep the partnership quiet from the public.
Most members of staff working at Google would have only found out about the news when they noticed a giant statue of the Android mascot made entirely out of KitKats was erected outside the company's Mountain View campus in California.
The partnership follows on from Nestle's acquisition of the Petfinder website in the US earlier this year; its first ever online content property.