they are: Free Viewers for Microsoft Office documents.
they help you: After installation of the required program,
a PC without a full version of Microsoft Office will have the
ability to view Microsoft Word, Excel, or Powerpoint
to use them: Download and install the desired program and
open the document(s) as usual.
the Microsoft Word Viewer >Here<
the Microsoft Excel Viewer >Here<
the Microsoft Powerpoint Viewer >Here<
it is: Adobe reader is free software that lets you view,
print, search, and share Adobe Portable Document Format (PDF)
files using a variety of platforms and devices.
it helps you: You will be able to open PDF files. The PDF
format is not Operating System (OS) specific thus providing a
format that can be viewed regardless of the OS.
you use it: Adobe reader just needs to be present on the
system that is required to open Portable Document Format (PDF)
files. PDF documents may be opened by document invocation
(Just click on them.)
the Adobe Reader >Here<