IBM is seeking $167 million from Groupon for failure to purchase a license for patents such as "single sign on" technology where a customer can sign into a website with a user ID and password from another company. An example of this would be signing into Groupon with a Facebook or Google ID. Another patent in dispute is a server load optimization for showing applications and advertisements. The server load optimization comes from when IBM purchased Prodigy which developed an early forerunner to the internet in the late 1980's. Groupon has refused to pay for a license because they believe that IBM is claiming ownership of the building blocks of the internet. "A key question for you in this case is whether these patents cover the world wide web," Hadden told jurors. "They do not and that is because IBM did not invent the world wide web." "We are here because IBM has another business that IBM does not talk about in its commercials," he said. "In that business IBM uses its huge stock of patents as a club to get money from other companies."