Once you've downloaded and unzipped a Laymans file you'll find an entire course of lectures, tests, and help documents.
Being in a 'Windows Write' format you can easily import the file into your favorite Windows 'Word Processor' like,  'Microsoft Word',  'Word Perfect',  'Ami Pro',  etc.
However, you can simply leave and use it in a 'Write' format as I do.

So how do I open a Write file?
In Windows 3.x open File Manager, Double Click on any Laymans file, and Write will automatically open up the lecture.  (Write.exe is part and parcel of Windows 3.x)

In Windows 95 you launch Windows Explorer and Double Click on any Laymans file and it opens up in WordPad.  I don't like WordPad because it can't even 'Justify' a document (make the sentences of the left and right margins begin and end in a straight line).
Here's how to force 'Write' to open instead of 'WordPad':
Launch Windows Explorer.
Download Write.exe into your  C:\Windows  folder.  (Copy the 239KB Write.exe file over the existing 5KB Write.exe file).
Hold SHIFT while you RIGHT CLICK on any Laymans file (*.wri).
A context menu will pop up, and one of the options will be 'Open with...' - select this option.
A dialog box will appear, asking you which program to use to open the file with.
Choose 'Write.exe' from the list in the dialog box.
If you can't find it there, select OTHER, double click on your 'Windows folder', and select 'Write.exe'.
At the bottom of the dialog box will be a check box called, "Always use this program..."
NB.  Make sure this check box is checked.
Click on OK.
Next time you double click on any Laymans file, Windows 95 will open it up with Write.exe.
To open File Manager in Windows 95 click on Start, Run, type in 'Winfile', and hit Enter.

Did you know that with WRITE you can:
Left, Right, Center or Justify paragraphs.
Layout size of page (i.e. wide or narrow margins on your printed page).
Repaginate (choosing at what sentence in your document you want your next page to begin).
Headers/Footers (page numbering and headings).
Change, enlarge, reduce, superscript and subscript fonts (e.g. Normal, Superscript, Subscript).
    Tabs, Indents (indented text).  (E.g. This line is tabbed in from the margin).
Ruler on/off (Click on Document and then Ruler On.  Do it again to switch it off)
Single, 1½, or Double spaced lines.
Find and replace text.  (Search through your entire document and Find all British spelled words like "programme" and replace them with the American rendering, "program").
Insert, move and resize objects and pictures.

For those who want to use Write I've listed all the Hotkeys that'll help you fly through your work.
Go to Write and Windows Hotkeys.
The majority of these keystrokes work in all Windows applications - so it's really worth the effort to learn them.