Answer:
Header files serve two purposes. System header files declare the interfaces to parts of the operating system. You include them in your program to supply the definitions and declarations you need to invoke system calls and libraries.
Answer:
WiMax
Explanation:
Wimax is a family standards of a communication of bandwidth, this is a standard IEEE 802.16, was created to provide data velocity like 30 or 40 megabits per seconds, but in 2011 was updated, and now can provide 1 gigabit per second, the name WiMAX is for a forum created in 2001 to promote the standard.
I believe lightbulbs have different brightness because of there quality parts that make it. The cheaper they are usually the worse quality. That is my theory.
