Bitcoin and its underlying technology are no longer just the realm of technology nerds, traders and idealists. Blockchain and cryptocurrencies are accepted by hundreds of large institutions and companies. Payment giant so far this year square has invested $ 50 million in Bitcoin, and at least 20 institutional investors have so far filed documents with the US Securities and Exchange Commission disclosing their own investments. However, cryptocurrency is just one application of the blockchain. Many companies are now using the technology to improve their business processes.

To keep track of this rapidly changing landscape, Forbes is now accepting nominations for its annual Blockchain 50 list of companies based around the world. The only requirements are that the company be a billion dollar company and do meaningful work every time blockchain is used, including finding new ways to streamline business processes, eliminate inefficiencies, reduce fraud, or just an old-fashioned one Investing in a new form of money to be made.

Previous list members include Facebook, which was added to the Blockchain 50 list in its inaugural year before its plans to launch a new currency called Libra became public. Long before Square made its historic investment in Bitcoin, it founded the payment company Twitter Co-founder Jack Dorsey made the list for some of his early exploratory investments in Lightning, a payments network designed to make it faster and cheaper to use Bitcoin to buy things. Other Blockchain 50 companies are energy giants Royal Dutch Shell, Auto giant Daimlerand the second largest bank in the world, China Construction Bank.

2021 Forbes Blockchain 50 list candidates are encouraged to complete this nomination form in as much detail as possible before Friday, November 6th. It’s three weeks from now, and the competition to be included is already underway. Given the complexity of building blockchain applications based on a distributed, shared infrastructure, advanced prototypes with dedicated industry participants can qualify a list member. Increasingly, the members of the list are launching live blockchain applications that pursue real value in new ways.

After the nomination period is up, a team of Forbes reporters specializing in a variety of industries will sort the nominees and look for the most mature blockchain programs run by the world’s most talented teams. The winners are expected to be announced in a 2021 issue of the magazine and online.

If you think you know a company that has the right prerequisites for the cut, please read the more detailed criteria here and fill out the list by November 6th.