External Links

Here is a list with links that you may find useful:

bitcoin.org
The Bitcoin Core client download
The Bitcoin Developer Guide
The blockchain as explained on Bitcoin wiki
The block as explained on Bitcoin wiki
The transaction as explained on Bitcoin wiki
The Armory client

A few links about orphan and stale blocks:

• https://bitcoin.org/en/developer-guide#orphan-blocks
• https://bitcoin.org/en/glossary/orphan-block
• https://bitcoin.org/en/glossary/stale-block
• http://bitcoin.stackexchange.com/questions/5859/what-are-orphaned-and-stale-blocks