it is a communication port which recives and sends data serialy
If you mean what OS it is OSx Mountain Lion. OSx is a Unix bases graphical interface.
I am assuming you mean what is SCSI used for? In this case, SCSI does NOT mean "small computer serial interface," instead, it means "Small Computer SYSTEM Interface." SCSI is used as a fast interface between a host adapter and the CPU that can daisy chain as many as 7 or 15 devices on a single bus.
admin down basically means that an adminstrator shutdown the interface for any number of reasons, and if the admin wanted to, they could bring it back up with the 'no shutdown' command.
what do mean by computer desktop
Serial means that each bit in a data packet is sent over one wire, one after the other (in chronological order). This is the opposite of parallel, where many bits are sent at once over several wires.
PATA (Parallel ATA), IDE or EIDE, is a interface used by storage and removable disk drives. Nowadays they are replaced by SATA (Serial ATA) and PCI Express.
It depends on what you mean by "desktop". If you are referring to a "desktop computer", Apple makes two. The more popular consumer-friendly one is called the "iMac". The pricier, more professional version is called the "Mac Pro". Apple created a revolutionary new design for their Mac Pro in 2013. If you are talking about the Mac OS X interface then the desktop is actually called "The Desktop". The term refers to the base screen of the Finder, which is the program used to find and manage files on the Mac. The terms "Finder" and "Desktop" are often incorrectly used interchangeably.
do you mean a computer please edit your question and elaborate on "desktop"
What do you mean?
The phrase a wallpaper on your desktop can mean that your desktop is covered in papers. This can be meant on your computer or your actual desk.
It means that the user interface has been vastly redesigned and hopefully improved.
I guess you mean Java, there is no interface in C++.