I the main unit
type calculator
country USA
year 1990
os RPL/Machine language
cpu Yorke (Saturn 1LT8)
speed 2-4 MHz
ram 128 MB
display 131×64
The HP 48SX — The Engineer’s Calculator
The HP 48SX, released in 1990, was one of the most powerful scientific calculators ever produced — a programmable RPL calculator with symbolic algebra, a sophisticated graphics system, and an infrared port for data transfer, in a device that became the definitive tool for engineering students and professionals worldwide throughout the 1990s. The 48SX’s combination of computational power, expandability via plug-in RAM and ROM cards, and HP’s legendary reliability made it the calculator that serious engineers trusted for critical calculations. Many engineers used their HP 48SX for decades, and the calculator remains in production in updated form today as testament to its enduring design.