Since laptops are designed to be used in a nearly endless variety of environments, they are capable of taking quite of bit of abuse when being used while on the go.
Two key components of a good laptop design are durability as well as reliability. Good solid plastics are the common material that the laptops under 200 these days are made from, and they are capable of taking a lot of punishment while being used.
Keeping your laptop safe from dirt and dust is still a very important point, yet when you take the computer along with you on outings then you will at least have the piece of mind that the laptop manufacturer has made an attempt to build the laptop with some degree of resistance to damages that may arise due to being portable.
While the case is what gives the overall protection to the laptops under 200 in most instances, there are some hard drives which will also be designed specifically for the rough treatment that any portable electronic device may encounter. These come in various incarnations such as the SSD drives for example. Yet this may be overkill for most laptop users since even the most basic model is going to be designed to take more heavier usage than what a stationary desktop computer would. Just because the laptops under 200 are cheap in price does not mean that they are cheap in design or materials.
Computer manufactures expend a significant amount of resources into the designs of their products. By nature, electronic devices such as laptops are actually rather sensitive. This includes circuit boards, drives, fans and other sensitive electronics. However over time there have been many improvements in the ability of portable computers and other electronic devices to remain protected within their cases.
The structural elements, often including metal braces, such as reinforcements within the computer are typically what keep the plastics themselves from caving in under some levels of pressure. Although you may be able to stack some items such as books on your laptop when you are packing, it is advised to still use some degree of caution when doing so. You should not put too much weight on the computer even though they are designed to handle some treatment such as this.