The Hewlett Packard 28S is a handheld graphing calculator that was launched by Hewlett-Packard in 1988, a year after the release of the HP-28C. While the two devices are quite similar, the HP-28S offers several improvements and additional features. It has a larger memory, operates more rapidly, and has a subdirectory structure for variables.
Features and Specifications
The HP-28S features a sleek design with a case, keyboards, and display similar to the HP-28C. The text above the display reads hp hewlett (/) packard and 28s, while further text describes it as an advanced (/) scientific calculator. The back of the calculator is made of molded plastic and displays the copyright mark of Hewlett-Packard, along with the manufacturing details.
The calculator was introduced by Hewlett-Packard at the January 1988 meeting of the American Mathematical Society in Atlanta, Georgia. It was part of the centennial celebrations of the AMS, and members attending the banquet had the opportunity to purchase an HP-28S for an extra charge of $60. The calculator itself was priced at $23
Manual and Usage
The HP-28S came with a spiral-bound manual titled hewlett-packard advanced scientific calculator reference manual hp-28s. The manual provided detailed instructions and information on how to use the calculator's advanced features. It was dated October 1987, indicating that it was released prior to the calculator's launch.
References and Further Reading
- W.A.C. Mier-Jedrzejowicz, A Guide to HP Handheld Calculators and Computers, Tustin, California: Wilson/Burnett Publishing, 199
- David G. Hicks, The Museum of HP Calculators, http://www.hpmuseum.org/, accessed July, 201
- P. A. Kidwell, A. Ackerberg-Hastings and D. L. Roberts, Tools of American Mathematics Teaching, Baltimore: Johns Hopkins University Press, 200
- M. Muciño, “Buyer’s Guide to Graphics Calculators,” Mathematics Teacher, vol. 81 #9, December 198
- Ivars Peterson, “Mathematics: Calculus in the Palm of Your Hand,” Science News, vol. 133 #4, January 23, 198
The Hewlett Packard 28S is an advanced scientific calculator that was introduced by Hewlett-Packard in 198It offered significant improvements over its predecessor, the HP-28C, including a larger memory and faster operation. The subdirectory structure for variables also made it easier for users to organize and access their data.
Why is hp toner so expensive? | exploring the reasonsDespite being released over three decades ago, the HP-28S remains a popular choice among mathematicians, scientists, and students. Its advanced features and reliable performance make it a valuable tool for complex calculations and graphing functions.