@ TylerSBrenton: If (s)he asked, you should at least have the common curtosey to provide an answer that isn't a google result.

@ sosina abraha:
There are two branches of programming: functional, and object-oriented. Functional languages leave the entire language at your disposal without having to import other "classes". The problem that arises with functional languages, is that you end up re-typing out code again and again. For instance, let's say you're creating a program that requires networking protocols like TCP/IP and HTTP. So, you spend the time writing the program, and it works perfectly. Now, you go to write another program, some time later, and you require the TCP/IP and HTTP protocols this time. You are going to find yourself re-typing or copy-and-pasting the code from the old program - this can prove to be time consuming, and perhaps even cause big errors in the code. Also note, most functional languages, are scripting languages.

Now, with Object Oriented Programming approaches code importing a little differently. In Java, let's say, you have the option to just use the standard code base, which can keep small programs neat and tidy. But for larger applications, it starts turning into a functional approach to things - and not to mention, some things in Java just aren't possible without importing some classes. Object-Oriented Languages make use of "objects", "classes", "inheritance"...things like that. A class is an object definition, and an object is a creatable/destroyable instance of a class - it's a roundabout definition, but it's the best I can do for the moment. Inheritance allows other classes to keep their inherent functions (or, as Java-heads call them, "methods"), and expand on the number of methods available to the user through that one class.

For more on this, Wikipedia is always a good reference, and if you would like to get into Object-Oriented Programming, Java would be a good place to start - it teaches you what you need to know about OOP, and without the complexities of operator overloading and pre-processor calls inherent in C++.