iSilo™ is a document reader, used primarily for reading documents in the iSilo™ document format. It was originally developed for the Palm OS® platform as a document reader providing the ability to view formatted and hyperlinked documents mainly converted from HTML. In the time following its introduction, people began to create documents in iSilo™ format and its popularity grew.

Originally, applications on Palm OS® devices were capable of only accessing data organized in the Palm database format since everything in the memory of a Palm OS® device was a database in that format. As a result the iSilo™ document format had to use that format as the top-level format for its data. Hence, files in iSilo™ format will most likely have an extension of .pdb. Files with an extension of .pdb are generally in the Palm database format. However, please note that even though a file may have an extension of .pdb, chances are that it is not a file that is a document in iSilo™ format unless you are specifically told that it is.

As mentioned earlier, iSilo™ and its document format was originally designed for the Palm OS®. The presumption was that on other operating system platforms, a person would have access to the original source of the document. Presumably, the author would make available an HTML version of their document. However, many documents currently available in iSilo™ format were specifically formatted for that format and are not readily available in HTML format by the creators of those documents. So iSilo™ for Windows® CE Handheld PC fills the need for a Handheld PC version.

document types

iSilo™ provides direct support for a set of standard document types and a catchall for textually viewing the content of any other document type, useful for viewing plain text files.

standard document types

catchall document type

You can use iSilo™ to open any other type of file for viewing in text mode. This is generally only useful for files in a plain text format as iSilo™ presents the content as is. If the format of the content is binary or a mix of text and binary, then you may see gibberish.
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