A database is a repository of information, a place where information is stored. Anytime you access digital information, it comes from a database. For example, when you download a song from iTunes, you send a request to Apple’s database of music, which then gives you permission to download the file for the song to your computer. When you access your bank account a database is also used. This database is controlled by your bank and is a simple record of all deposits, withdrawals, and other account activity. These types of databases are known as “permissioned” databases, which means that only authorized users are allowed to access and modify the information found on them.