How to open .dat files?

Hi experts,

I searched online on how to open files prexied to .dat extension.

I received these files from one of my friends whom she could not open these files. So she just sent me 4 files which are prefixed to .dat extension.

I went to this url to read more about it but it still open them in rubbish coded machine language http://smallbusiness.chron.com/open-dat-file-word-54899.html


Anyways, I assumed its a pdf file or word docs. All of them (4 files in total) are named

1.Evaluation AFPPD 1.dat (323KB)
2.Evaluation AFPPD 2.dat (244KB)
3.Evaluation AFPPD 3.dat (231KB)
4.Evaluation AFPPD 4.dat (273KB)

Will these be files or copied-extensions of the original files (ie: Evaluation AFPPD 1.dat (1MB))?

What others think?
BakakaAsked:
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Dave BaldwinFixer of ProblemsCommented:
The 'dat' extension has been used by too many programs to give you a reliable answer.  If you can view the hex code with something like FileAlyzer, you can often see what program generated them and maybe that will give you a clue about what to do with them.  https://forums.spybot.info/downloads.php?id=5
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JohnBusiness Consultant (Owner)Commented:
No. They are normally screwed up Outlook Files. If Outlook (normally Express) screwed up a DOC or PDF file, you need to contact the person and ask them to resend properly (or have someone else send the file to you). Once .DAT there is not much useful you can do.
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arnoldCommented:
Without knowing the source of the file it is difficult to answer, try using outlook.

How did you come by these files.  You may need to use hex editor to try to glean the source/what created the file.

There are too many possibilities.

Did you name the file, look at what afppd is and see whether that helps in shedding light on the situation.
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