Dear Member and Ata sir, Many many thanks for help. I am using MarcEdit for conversion of record. Everthing is ok during conversion of text file to marc. Since subject added field is repeatable and I am using 650$a for subjectadded entry available for a title.So during search in OPAC all subject added entry come in a single string. Like, Nonlinear dynamical systems;Fractals these two subject added entry considerd as a single string in my OPAC. anyone please help me how to treat a repeatable field and how I will put marc tag for them. I put all subject added entry in a single tab, Shall I have to put all subject in different tab????????? For example I pasted two .mrk file for viewing =LDR 00000nam a2200000Ia 4500 =008 080919s9999\\\\xx\\\\\\\\\\\\000\0\und\d =080 \\$a511$bLIN =100 \\$aLINES M; =245 \\$aThink of a number =260 \\$aBristol$bInst. of Physics$c1990 =300 \\$a"viii+163p," =650 \\$aNumber theory;Popular book; =942 \\$cBK =952 \\$o511LIN$p17653 C$aRRI$bRRI =LDR 00000nam a2200000Ia 4500 =008 080919s9999\\\\xx\\\\\\\\\\\\000\0\und\d =080 \\$a536.767$bFRO =100 \\$aFROYLAND J; =245 \\$aIntroduction to chaos and coherence =260 \\$aBristol$bInst. of Physics$c1992 =300 \\$a"vii+130p," =650 \\$aNonlinear dynamical systems;Fractals; =942 \\$cBK =952 \\$o536.767FRO$p17652 C$aRRI$bRRI Many Many thanks in advance, vijay kumar NCSI,IISc Bangalore