I am aware that articles are the modifiers, which introduce a noun/noun_phrase in a sentence, and by the rules of English grammar we should use an article before referring to a noun in a sentence.

However, I see that the above rule is not strictly followed. I have seen sentences where though a noun/noun_phrase is used in a sentence but an introductory article is not used.

Eg : Login to desktop and start the paint application [ Desktop is a noun, hence I expect either "Login to a desktop and ...." or "Login to the desktop at the corner and ....."]

So please help me understand, when can an article be omitted ?
Thanks in advance.


Question: How to programmatically dim Mac backlit keyboard
Answer: UInt64 lightInsideGetLEDBrightness()
{
kern_return_t kr = 0;
IOItemCount   scalarInputCount  = 1;
IOItemCount   scalarOutputCount = 1;
UInt64        in_unknown = 0, out_brightness;
//kr = IOConnectMethodScalarIScalarO(dataPort, kGetLEDBrightnessID,
//                                  scalarInputCount, scalarOutputCount, in_unknown, &amp;out_brightness);
kr = IOConnectCallScalarMethod(dataPort, kGetLEDBrightnessID, &amp;in_unknown, scalarInputCount, &amp;out_brightness, &amp;scalarOutputCount);
return out_brightness;
}


It may help you.