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Need to understand UPS equipment better

700 VA  - 240 Watts
Up to 75 minutes
6 outlets
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What's VA?  What's master and controlled master do for the outlets on a UPS. Also, how do I spec out usable (battery backup) outlets?  Does the USB safely power down the server?  Does the safe shutdown feature work for NAS equipment too or other IT items?  Is their third party software?  I was specing out the UPS below too...  how do I spec out usable (battery backup) outlets?

CyberPower PFC Sinewave Series OR1000PFCRT2U
UPS (rack-mountable / external) - AC 120 V - 700 Watt - 1000 VA 9 Ah - USB, serial -
output connectors: 8 - 2U
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Because I don’t have the time or the resources to contact them so I have EE subscription instead.
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Ok, great.  So they automatically know to shut down the system when the power is getting weak.  

The master option looks priority to cyberpower?  Can you elaborate?  I'm not following that statement.

Has some control?  Can you elaborate ?
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The Master and controlled by master is to shut down peripherals as well as the PC/server.
http://manualzz.com/doc/6594401/user-manual-and-warranty
Thanks guys for the really in depth material.   @ Andy I saw your document.   I'm curious, can I get power adapters that make sure they don't draw power when "off" regardless of computer being in play in the scenario.  Is the Cyber Power or an industry wide standard power strips sometime follow with "master" and "controlled Master"

@Mal I really appreciate the break down.  I guess my questions play into the question above about what I should be look for when specn out a UPS and trying to figure out the outlet situation.  It looks my illustration only allow for three battery backed up outlets.   Are these industry wide lingo  "master" and "controlled master?"
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The "Master" and "Controlled" outlets are not common on UPS; this is an unusual device in that regard. Thus there in no standard lingo.   It is not a feature that would be all that useful for servers, but could be used on a PC or home stereo system.

Although there are limited outlets, it is possible to use power boards to fan this out to may devices.