Vintage Hewlett-Packard HP-67 / HP-97 Mechanical Engineering Pac I (Product No. 00097-13155)**Up for sale is a highly collectible, vintage HP-67/97 Mechanical Engineering Pac I software expansion kit from the late 1970s. This software was designed to run on the legendary HP-67 and HP-97 programmable magnetic card calculators. This set is exceptionally complete and comes with:- **Original Outer Storage Box** (Shows minor vintage shelf wear, marked with original owner's name tag)- **Original Spiral-Bound Manual / Programming Guide** (Product No. 00097-90094, pages are clean and binding is completely intact)- **Original Vinyl Program Card Wallet** containing the specific pre-programmed magnetic formula cards. **Magnetic Program Cards Included Cover:**- Vector Statics (ME1-01A1)- Section Properties (ME1-02A1 / ME1-02B2)- Stress On An Element (ME1-03B)- Soderberg's Equation (ME1-04A)- Gear Forces (ME1-15A)- External Involute Spur Gears (ME1-16A)- Belt Length (ME1-17A)- Free Vibrations (ME1-18A)- Helical Spring Design (ME1-09A)- Four Bar Function Generator (ME1-10A1)- ...and more as pictured!**Condition:** Cosmetically in great vintage condition. Please note that the original owner's name ("John A. Schiro") is cleanly written on the card wallet insert and marked on the box as shown in photos. The magnetic cards have not been tested on a physical machine and are sold as-is due to the age of legacy magnetic media. Perfect addition for any vintage computing or HP calculator enthusiast! Ships promptly and securely packaged.