In Sap script what is the meaning of IC.

hi gurus..

can anybody tell me wats the meaning of ic in sap script.. example i am modifying one standard script name J_1IEWT_CERT in this script in main window there is a variable

&printab-wt_qsshh(ic)& wat does IC mean in it and & printab-budat(icz)& wat does icz means.

and can any body give such more formatting text in sap script.