A sign at one of Google's secret "Glass Foundry" developer events in New York and San Francisco earlier this month. Google Today, Google posted a summary and photos of two wearable computing developer events it held for its "Project Glass" in early February in New York and San Francisco. The events, called Glass Foundry, gave developers who signed nondisclosure agreements early access to the application programming interface for the Glass wearable computing device and an opportunity to spend two days developing applications for them. The events gave Google engineers an opportunity to get direct feedback from developers on the API before the general release of Glass Explorer, which is itself a developer-only release of the Glass hardware.