What are blockchains?

---

Now we'll look at the major players in the game. Try to think of these projects as shopping malls. You don’t directly do business with the mall, but you use it to access the businesses inside. These businesses decide which blockchain or mall to build on based on several factors, such as code compatibility, security, and the number of users on the particular blockchain. In this section, we will list several major blockchains and provide some information about them. Some are run on Proof of Work (POW), and some are Proof of Stake (POS). One even runs on the Proof of History (POH) concept. They all differ somewhat in how they run their fees and code, but the basic concept for the user is the same. Below are a few of the major blockchains operating now.