8-E. Prescription. "Prescription" means an order, formula or recipe issued in any form of oral, written, electronic or other means of transmission by a duly licensed practitioner authorized by the laws of the State.

8-F. Prewritten computer software. "Prewritten computer software" means computer software, including prewritten upgrades, that is not designed and developed by the author or other creator to the specifications of a specific purchaser. Computer software created by combining 2 or more prewritten computer software programs or portions thereof is prewritten computer software. "Prewritten computer software" includes software designed and developed by the author or other creator to the specifications of a specific purchaser when it is sold to a person other than the specific purchaser. When a person modifies or enhances computer software of which the person is not the author or creator, the person is deemed to be the author or creator only of the person's modifications or enhancements. Prewritten computer software or a prewritten portion thereof that is modified or enhanced to any degree, when the modification or enhancement is designed and developed to the specifications of a specific purchaser, remains prewritten computer software; except that when a reasonable, separately stated charge for the modification or enhancement is shown on an invoice or other statement of the price given to the purchaser, the modification or enhancement does not constitute prewritten computer software.

9-A. Primarily. "Primarily," when used in relation to machinery or equipment used in production, means more than 50% of the time during the period that begins on the date on which the machinery or equipment is first placed in service by the purchaser and ends 2 years from that date or at the time that the machinery or equipment is sold, scrapped, destroyed or otherwise permanently removed from service by the taxpayer, whichever occurs first.

9-B. Production. "Production" means an operation or integrated series of operations engaged in as a business or segment of a business that transforms or converts personal property by physical, chemical or other means into a different form, composition or character from that in which it originally existed. "Production" includes film production.