Hardware for computers includes the computer itself, the monitor, keyboard, printer, mouse and speakers. There is also hardware inside the computer including the motherboard that holds the main processing chips that make up the central processing unit (CPU). The hardware processes the commands it receives from the software, and performs tasks or calculations.There are basically four places to buy hardware for your computer. These are auctions, the Internet, local retailers and mail orders. The following is a condensed review of each of the above.Auctions are the most popular sites for purchasing hardware for your computer. Low cost is the main factor that drives people to auctions. However, there are some things that you should be aware of. Unfortunately, on-line auctions are riddled with scams. As a matter of fact, it is the number one place for thefts and scams. You need to make sure that you know as much as you can about the seller so that you will not be buying stolen or copied, illegal goods. Online auction sites like e-bay or Yahoo are pretty reliable sites to go to if you are looking for safe auctions.The Internet is a popular place to check out computer hardware sales, but you must be sure that when you buy hardware (or any purchase) over the Internet, the site offers some kind of security to prevent information about you from being stolen.Your local computer store is one of the safest places you can go to buy hardware for your computer. Just make sure the store has knowledgeable salespeople. These days, good help is hard to find, and a sales representative may not have answers to your questions or give you false information. You must also inquire about “return policies” in case you buy defective parts.Finally, mail ordering computer parts is somewhat safe if you follow a few common sense steps. Make sure that the mail order company has a valid phone number where you can speak with someone if you need to. Know the company’s return policy and verify the warranty on the products you are purchasing.