Answer:
Mainframe Computer is capable of doing all the functions which are listed in question.
Explanation:
A mainframe is a very large general-purpose computer (usually costing millions of dollars) that is capable of performing very many simultaneous functions, supporting very many simultaneous users, and storing huge amounts of data. A microcomputer is the type of computer you use.
The answer is flash mob. They called it flash mob when a large number of people in twitter gather in group for a centralized face to face meeting. In flash mob, people are gathering to be able to create a community that is helping each other or even just talking to each other.
That answer would be internet explorer
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Web Note. You can access the feature by selecting "Make a web note" and several options on the toolbar will pop up for use. Microsoft has a help page here: https://support.microsoft.com/en-us/help/17221/windows-10-write-on-the-web