When an important file is saved on two different computers, the name of the file that is housed on the second computer is 'back up'. Back up refers to the process of copying and archiving a particular computer data in order to have an extra copy to fall back on in the event of data loss. <span />
<span> change the behavior of the program I think</span>
Doesn't look like there are any..
D) a type of training that allows...
It is used to describe a variety of web based platforms, applications, and technologies that allow people to socially interact online.