Bitcoin's so-called "White Paper" was originally issued by Satoshi Nakamoto in 2009, which describes how the system he invented works. Bitcoin is basically a software, anyone can run it on their computer and participate in a global economy.
Bitcoin is a cryptocurrency, a form of electronic cash. It is a decentralized digital currency, no company, country or third party owns or directs it. It can be sent from user-to-user on the peer-to-peer bitcoin network without the need for intermediaries.
Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain.*