As far as humans are concerned. What's written in the programming language needs to interpreted or compiled into something that the machine can actually deal with.
there are different ones like
Not Otherwise Specified
Network Operating System
The answers of the following are:
1. The answer is Linux. It is not an Operating System.
2. Windows XP 2000 and Windows XP Home Edition have the same interface design.
3. Linux is the operating systems which is considered to be open source.
4. Mac OS is an operating system which is considered to be the most popular with graphic and multimedia designers
5. The software programis the number and variety of programs available for a particular operating system.
Create an adjustment layer and create a hue and saturation layer. You'll see sliders so adjust them to your liking. next select a layer mask and fill it will black. then select which areas you want to darken and use the wand tool. Apply a gradient mask if you want.