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.
There are a few other things your operating system does that you probably don't think about. For instance, it's the operating system (not just the hard drive) that's going to decide how to manage memory. The operating system needs to delegate how much memory each process uses and make sure no memory overlaps.