Operating System (OS)
You can set the width taskbar area and different components in it

By right click and set width menu
If the taskbar is not yet locked
If other toolbars are not enabled
If the applications are not opened

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Operating System (OS)
The Memory Address Register

contains the address of the memory location that is to be read from or stored into.
None of these
contains a copy of the designated memory location specified by the MAR after a "read" or the new contents of the memory prior to a "write".
is a hardware memory device which denotes the location of the current instruction being executed.
is a group of electrical circuits (hardware), that performs the intent of instructions fetched from memory.

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