PTR (Price to Retailer) and PTS (Price to the stockist) Is essentially a computer software that can help pharmaceutical and biotechnology companies in the calculation of contract terms, the cost of products, and other financial terms related to the manufacture and commercialization of medicines. It helps in maintaining proper accounting records of the financial transactions of the company. As more pharmaceutical companies are venturing into the pharmaceutical manufacturing business, accounting records are becoming extremely important. In fact, accounting has now become one of the basic essentials of Pharmaceutical Engineering and has achieved steady growth in the pharmaceutical area of science.