strange cars

In Internet Marketing class, for students - beginner students I often use a car as an example of CMS. As a CMS, when we buy our cars direct to use our car, without having to know how to manufacture it and how it works so that cars can run, we can directly use with the help of functions - functions that are provided, such as to control the steering wheel, gas pedal to regulate speed, gears to adjust acceleration, etc.. Likewise, CMS, after having CMS we no longer need to know how to make a web, programming languages, and other details, we immediately given function - the function of assistance, such as the function of post to send the post, the function to manage comments, etc.. In the car, to go into it we have to go through the door, and opened with a key to the door. Similar to CMS, when we want to go to the backpage (admin) we will go through a doorway and requires a username and password. Even mobilpun can be modified as a CMS, we can change the appearance, add new tools (plugins) so our cars will be different than the original. One more thing, CMS also has a type - a special kind. For example in the car, there are a large family cars and a box-shaped (usually), then there is a sports car (usually a sedan), there is a kind of big and powerful trucks. In CMS there are also species - species, such as CMS for blogs is WordPress and Drupal, just to sell there Prestashop or osCommerce, then there Boonex Social Network (Dolphin) and Status.Net. If CMS is a car, then WordPress is a cheap Japanese car and easily obtained, and the modifications that can be done in it very much, especially for the display. The device can be installed in it also has many options, from a good up to that still in development stage. Create the car hobby and fun to modify the cars - Japanese car is the right choice. As with WordPress, for people who like to disassemble the CMS WordPress is fun. The other is the Drupal CMS, which I think is similar to a car - an American car. Famous American car strong and powerful, although it looks normal, except that a new tool that can be added is also not much unless you really - really understand the machine. Thus Drupal core engine of his famous strong and good, but the view is not given much choice. Drupal is suitable for people - people who like to disassemble the engine, using heavy equipment, coding, etc.. Besides these two there is also Prestashop CMS. PrestaShop is a CMS for e-commerce (selling). CMS is a bit like a car - luxury European car, the car fast, durable and elites, not many options to change the look or machinery therein. When a Car - European car, you will not want to change it. CMS let alone that you never use? What is your opinion on CMS? CMS if it is a car then? yes ... thanks for the opinions