The question should not be โWhat ISย data processing?โย but instead, โWhat ISNโT data processing?โ. On January 3, 2017 the Texas Comptroller issuedย 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) collateralizedย real estate loans. The lender wanted to know if the purchase of a specific service from one of their vendors was taxable underย Tax Rule 3.330 โ Data Processing.