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.
Operating systems are there from the very first computer generation. Operating systems keep evolving over the period of. time. Following are few of the important types of operating system which are most commonly used. Batch operating system. The users of batch operating system do not interact with the computer directly. Each user prepares his job on an off-line. device like punch cards and submits it to the computer operator.