The question should not be ‘What IS data processing?’ but instead, ‘What ISN’T data processing?’. On January 3, 2017 the Texas Comptroller issued Private Letter Ruling #142730026. This Private Letter Ruling (PLR) was issued to an unidentified company (i.e., lender) which underwrote (i.e., loaned money on) collateralized real estate loans. The lender wanted to know if the purchase of a specific service from one of their vendors was taxable under Tax Rule 3.330 – Data Processing.