DAT file

Hi, I have a database file with the extension DAT, this file is associated with a MMO file (a memo file I would guess) and a NDX file (index file, I'm pretty sure).    I have opened it as a text file and there's no clue as to what type of file this is, only a "PCS" word in the header.  

Does anybody know what I can use to open this file?
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Buropro-CitationAuthor Commented:
Hi als315, I have tried both DBISAM and CLARION and they don't recognize the DAT file.    DBISAM crash and CLARION just says that it is invalid.
May be you know some history about these files? Do you have any application working with these files?
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Buropro-CitationAuthor Commented:
It's a database, this is sure, I have a Customer that have an old invoicing software and I'm installing my new software solution to them but I need to be able to at least import Customer data from their old software.
May be this old software has any name?
Buropro-CitationAuthor Commented:
it is called Retail point software, it's a graphic interface (not DOS), I would say this dates from the last 10 or 15 years.
Sorry, never before hear about it.
There is site: http://www.retailpoint.com. May be it is old version of this software and they can help you?
Buropro-CitationAuthor Commented:
I don't think they would help since I'm trying to sell a software that will replace what they have, they wan't to keep their Customer.
May be this software has any reports, which could be saved as text files and imported?

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Buropro-CitationAuthor Commented:
Some reports have informations but very important informations are missing.   Importing from the DAT file would save my customer days of work.
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