do now 4.6.11

why is it important to have a header or footers?
Headers and footers are useful for keeping documents intact

Universal Serial Bus (USB)

Is a specification to establish communication between devices and a host controller (usually personal computers), developed and invented by Ajay Bhatt working in Intel.

USB Flash Drive

Its a removable flash memory device that plugs into a computer's USB port.

trackball

Is pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes--like an upside-down mouse with an exposed protruding ball.

table pc

A computer shaped in the form of a notebook except it has the capabilities of being written on through the use of digitizing tablet technology or a touch screen.

Supercomputer

Is a computer that is at the frontline of current processing capacity, particularly speed of calculation.

software

Its a written programs or procedures or rules that's associated into a documentation pertaining to the operation of a computer system and that are stored in read/write memory.