This folder contains two other folders:
folder 'programs' 
folder 'docu'

Folder 'programs' contains programming examples from the ABAP/4 book.
The file '_index' contains an index for all sample programs. 
The naming convention is as follows: for example, 'chap2501'
is the first ABAP/4 program example of chapter 25.
To test such a program in your R/3 system, create a program with
the ABAP/4 Development Workbench as explained in chapter 3 and give
it a name of your choice.
Then choose Utilities->Upload from the Editor Menu. A pop-up screen
appears where you should enter the complete name of the program source file,
for example E:\abapbook\programs\chap2501.txt if your CD resides on drive E.
The program text is transferred into the Editor and you can test this
program.

Folder 'docu' contains the online documentation of all ABAP/4 key words.
File 'abapdocu.txt' is a plain text document which can be read with any
editor. 
All other files are in HTML format (Hypertext Markup Language), and you can
view them with any Browser understanding this format.
To start browsing, it is best choosing the file 'abapindx.htm' which 
contains all key words in alphabetical order.