user15540: I've been reading official BTC documentation and now I'm completely lost. Documentations is too tangled and written in unnecessary many words.
They have:
https://en.bitcoin.it/wiki/Address
https://en.bitcoin.it/wiki/Accounts_explained (no, actually not explained)
https://en.bitcoin.it/wiki/Wallet
Please, somebody tell me the difference between them in a simple manner. What's an address, an account, a wallet, and how does the keys fit in.

user13463: "Accounts" are a concept limited to bitcoin-qt, and it's probably better to forget about them entirely.
Each address has a corresponding private key, that you use to move bitcoin out of that address. A wallet is simply a collection of (address, address_key) pairs.
Some people also use the term "wallet" to refer to the software that implements the wallet functionality.

Obviously, this is a grossly simplified answer, and not strictly true, but useful if you just want to understand bitcoin superficially.

15540: <p>I've been reading official BTC documentation and now I'm completely lost. Documentations is too tangled and written in unnecessary many words.
They have:</p>

<p><a href="https://en.bitcoin.it/wiki/Address" rel="noreferrer">https://en.bitcoin.it/wiki/Address</a></p>

<p><a href="https://en.bitcoin.it/wiki/Accounts_explained" rel="noreferrer">https://en.bitcoin.it/wiki/Accounts_explained</a> (no, actually not <em>explained</em>)</p>

<p><a href="https://en.bitcoin.it/wiki/Wallet" rel="noreferrer">https://en.bitcoin.it/wiki/Wallet</a></p>

<p>Please, somebody tell me the difference between them in a simple manner. What's an address, an account, a wallet, and how does the keys fit in.</p>
 13463: <p>"Accounts" are a concept limited to bitcoin-qt, and it's probably better to forget about them entirely.</p>

<p>Each address has a corresponding private key, that you use to move bitcoin out of that address. A wallet is simply a collection of (address, address_key) pairs.</p>

<p>Some people also use the term "wallet" to refer to the software that <strong>implements</strong> the wallet functionality.</p>

<hr>

<p>Obviously, this is a grossly simplified answer, and not strictly true, but useful if you just want to understand bitcoin superficially.</p>
