把 Joomla! 和作業系統做比較
From Joomla! Documentation
如果你無法想像 Joomla! 是怎麼運作的，你不妨把 Joomla! 當成一個作業系統（OS），如 Microsoft Windows、Apple macOS 或 Linux。
The most important similarity is that both your OS and Joomla! are not really intended for direct use. You need to install applications onto your OS (and extensions for Joomla!) to be able to actually do something useful with your computer (and your website). Just like your OS, Joomla! comes with a few core extensions that carry out the most important tasks.
Further similarities and differences can be found in the following table.
|Joomla! concept||OS concept|
|Core extensions||Built-in applications|
|File system||File system|
|Viewing a page||Using an application|
|Updating Joomla!||Installing updates for your OS|
|Migrating between Joomla! versions||Installing a new version of your OS
(e.g. moving from MS Windows XP to MS Windows 7)