SYSTEM FIELDS For ABAP Programming
SY-ABCDE It is a constant and contains alphabets(AB..Z). What ever the code page its value remains same.
SY-ULINE Contains a horizontal line with length 255 used in  creating lists.
SY-VLINE Contains a vertical line , used in  creating lists.

Serkan AKKAVAK
Computer Engineer
serkurumsal@yandex.com