Question 1

does this unit have wifi?

Accepted Answer

Sorry, I purchased the unit as a gift and it has not yet been used. I actually have the same question and may have to check with HP support.

Question 2

It says software includes "office" Which version of office and what programs? i.e., 2007, 2010, 2013, Excel, Word, Powerpoint...

Accepted Answer

my pc came with a version of word perfect - not ms office.
It appears that some configurations may be different as well.  
My buddies pc came with a keyboard that had a CAC reader.  Mine did not.  My drive configuration was also weird with a "C drive" partition with only 39 gig i think.  i had to re-do the partitions to make drive C usuable.  that small partition would have filled up quick.  once i changed that, things seem to be ok so far.

Question 3

Does this have an HDMI connector?

Accepted Answer

The unit does not have a built in HDMI connector.  It has a VGA and a Display Port.  You can purchase separately a Display Port to HDMI adapter.

Question 4

What does "small form factor" mean?

Accepted Answer

Hello,

Thank you for contacting us in regards to your question.  A small form factor (SFF) is a computer form factor designed to minimize the volume of a desktop computer.

Thank you, 
Newegg Support

Brand	HP
Model	DC7900

Type	Business Desktops & Workstations
Form Factor	Slim/Small Form Factor
Usage	Business
Processor	Intel Core 2 Duo E7500 2.93GHz
Memory	4GB DDR2
Storage	2TB
Optical Drive	DVDRW
Operating System	Windows 7 Professional 64-Bit
Software Included	90 Days Subscription: Antivirus, Winzip, Office

CPU Type	Core 2 Duo
CPU Name	Intel Core 2 Duo E7500

HP DC7900 [Microsoft Authorized Recertified Off Lease] Small Form Factor Desktop PC with Intel Core 2 Duo E7500 2.93Ghz, 4GB DDR2 RAM, 2TB HDD, Windows 7 Professional 64 Bit

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Item#: N82E16883280672