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I would like to download some files that starts with pdl or mms. These are not register protocol. Anyone know what software do I need to download them and where to get the software?
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.pdl files are 'Perl Data Language' files. A text editor can open them.

.pdl files can also be 'Page Description Language' files. It's part of the PostScript printer language.

For the first case, MacPGP 2.6 should open them. As for the printer one, i'm not sure.

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As for .mms files, it's part of the VMS/CMS source control code. JamBase on the PC should open these.

I've also seen references to Windows Media Player 7.1 for Mac stating something about an MMS protocol, otherwise known as 'Microsoft Media Server'.

From Microsoft:

To play content that uses MMS, start Windows Media Player, and on the File menu, click Open URL, and then type the URL.
 

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Page Description Language (PDL)
Last modified: Thursday, April 17, 1997 

A language for describing the layout and contents of a printed page. The best-known PDLs are Adobe PostScript and Hewlett-Packard PCL (Printer Control Language), both of which are used to control laser printers.

Both PostScript and modern versions of PCL are object-oriented, meaning that they describe a page in terms of geometrical objects such as lines, arcs, and circles.

http://www.webopedia.com/TERM/P/Page_Description_Language_PDL.html

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PDL (``Perl Data Language'') gives standard Perl the ability to compactly store and speedily manipulate the large N-dimensional data arrays which are the bread and butter of scientific computing.

PDL turns perl in to a free, array-oriented, numerical language similar to such commerical packages as IDL and MatLab. One can write simple perl expressions to manipulate entire numerical arrays all at once. For example, using PDL the perl variable $a can hold a 1024x1024 floating point image, it only takes 4MB of memory to store it and expressions like $a=sqrt($a)+2 manipulate the whole image in a few seconds.

A simple interactive shell (perldl) is provided for use from the command line and a module (PDL) for use in perl scripts.

The PDL distribution for Perl is free Software and provides extensive numerical and semi-numerical functionality with support for two- and three-dimensional visualisation as well as a variety of I/O formats. The goal is to allow PDL to interact with a variety of external numerical packages, graphics and visualisation systems. Easy interfacing to such systems is one of the core design features of PDL.

http://pdl.perl.org/
 
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