I.R.I.S. Readiris 14 for Mac User Guide - Manual (Page 89)

Section 8: Saving Documents
84
 XLSX
XLSX is the new standard spreadsheet file format in
Microsoft Excel 2008 and 2011 and in iWork Numbers.
XLSX files are created using the Open XML standard. Each
cell in an XLSX file can have a different formatting.
See the section Selecting the Layout Options for more
information about the available layout options.
 HTML
HTML stands for "Hypertext Markup Language". It is the
predominant markup language for web pages. It provides a
means to describe the structure and formatting of text-based
information in a document. This file format can be opened in
Microsoft Excel, in Web browsers such as Safari, and in Web
page editors such as Adobe Dreamweaver.
Note: HTML is the recommended format when saving
documents to Evernote.
See the section Selecting the Layout Options for more
information about the layout options.
 TXT (Unicode text)
A TXT file is a standard text document that contains
unformatted text. TXT files can be opened in any text editing
or word processing application.
No Layout options are available for TXT files.
 Image File formats
Although Readiris is a text recognition application, it can also
save documents as image files.