There was a time in the 1980's where IBM crushed some competitors rightly so for using their copyrighted BIOS. These vendors actually just copied the code. However, two companies successfully warded off IBM. They were Compaq and Phoenix Technologies. You can watch "Silicon Cowboy's" on YouTube where Rod Canion and others involved directly in the process talk about it.

You never start a sentence with "And". Only the newer generation grammar schooled on the Internet can use conjunctions that way. Do you not remember the "Conjunction Junction" videos from the past? http://www.youtube.com/watch?v=mkO87mkgcNo