SunGard Shareholder Systems Inc , a subsidiary of SunGard Data Systems Inc , said it had entered into a definitive agreement to buy the Securities Products Business unit of CheckFree Corp .
<response> <organization>SunGard Shareholder Systems Inc</organization> , a subsidiary of <organization>SunGard Data Systems Inc</organization> , said it had entered into a definitive agreement to buy the <organization>Securities Products Business</organization> unit of <organization>CheckFree Corp</organization> . </response>