AFAIK

( //, n.)

   [Usenet;  common]  Abbrev. for "As Far As I Know". There is a variant
   AFAICT  "As  Far As I Can Tell"; where AFAIK suggests that the writer
   knows  his  knowledge  is  limited, AFAICT suggests that he feels his
   knowledge  is  as  complete  as  anybody  else's  but  that  the best
   available knowledge does not support firm conclusions.

[glossary]