Amazon.com is preparing to open Amazon Go supermarkets and pop-up stores, an expansion of the company’s cashierless ambitions that includes the possibility of licensing the technology to other retailers. Bloomberg reports:

The new store formats and licensing initiative could launch as soon as the first quarter of 2020, according to a person familiar with the project. Amazon is testing a supermarket equipped with Go technology in a 10,400-square-foot retail space in Seattle’s Capitol Hill neighborhood.

The Go expansion is the e-commerce giant’s latest attempt to compete in the $900 billion U.S. grocery industry and perhaps other areas of retail, as well. The company already operates the Whole Foods Market chain and last week confirmed plans to launch a separate supermarket brand, starting with a location in the upscale Woodland Hills neighborhood of Los Angeles. Those stores will have human cashiers. The previously unreported plan to expand Go revives Amazon’s original vision of creating full-size grocery stores without checkout lines.

Amazon opened the first Go convenience store at its Seattle headquarters almost two years ago and now operates 21 locations around the U.S. It’s not clear how much money the company has lavished on the project, but some of the 1,000 or so people working on it were recently told their cumulative salaries have totaled more than $1 billion since the project got underway in 2012, the person said.