The manifestations of systemic lupus erythematosus as well include inflammation of the kidneys, loss of appetite, fatigue, and hair loss. Likewise, the origin of rheumatoid arthritis is still not known.The condition can attack the knees, wrists, feet, fingers, and ankles.he manifestations of systemic lupus erythematosus as well include inflammation of the kidneys, loss of appetite, fatigue, and hair loss. Likewise, the origin of rheumatoid arthritis is still not known.
Quick Answer. An operating system is the most essential program that allows a computer to run and execute programs. Without an operating system, a computer cannot be of any important use since the computer's hardware won't be able to communicate with the software. Continue Reading.
Many corporate servers use the Linux or UNIX operating systems. The operating system (OS) is the first thing loaded onto the computer -- without the operating system, a computer is useless. Â­Â­Â­More recently, operating systems have started to pop up in smaller computers as well.