definiens: shall mean the software, programs and/or computer instruction sets, other than the Source Code, consisting of the versions thereof existing and deployed at XOMA as of the Amendment Eff ~ tive Date and more fully described in item A.l of Schedule l.46 and item A.1 of Schedule 1.89A and any changed or modified versions thereoftbal correct significant de­fects contained in the Software as of tbe Amendment Effective Date ( ) . Ex­pressly excluded from che definition of Software are ( a ) other programs, software audior com­puter instructions that XOMA derives from such programs, software aD < i / orcomputer insuuctions or develops, acquires or obtains the rigbt to sublicense during the term of this Schedule 6A.3, as well as ( b ) any changed ., modified or enhanced versions of the Software ( other than Corrected Software )