Questions

Veins are blood vessels that carry blood toward the heart. Most veins carry deoxygenated blood from the tissues back to the heart; exceptions are the pulmonary and umbilical veins, both of which carry oxygenated blood to the heart. In contrast to veins, arteries carry blood away from the heart.

Veins are less muscular than arteries and are often closer to the skin. There are valves in most veins to prevent backflow.

Micro-kernal : A micro-kernel is a minimal operating system that performs only the essential functions of an operating system. All other operating system functions are performed by system processes.

Monolithic : A monolithic operating system is one where all operating system code is in a single executable image and all operating system code runs in system mode.

Town planning, Drainage system and Use of Bronze are the features of Indus Valley Civilization. Use of Iron was not the feature of this.

1.Logout of your computer each time you have finished using it

2.Install and use anti-virus software on your computer 

3.Do not use emails on your machine

4.Make sure all your files are safely stored to your floppy disks