HP 27S Scientific Calculator - USED

Step back to the late 1980s, when innovation met ingenuity in the palm of your hand. The Hewlett-Packard HP-27S, introduced in April 1988 as part of the acclaimed Pioneer series, stands as HP's groundbreaking first fully algebraic pocket scientific calculator. Codenamed "Mentor," this sleek, slim marvel—measuring just 5.3 x 2.9 x 0.4 inches and weighing a featherlight 3.5 ounces—delivers the power of a desktop computer in a battery-powered (CR2032) portable powerhouse, ready to tackle everything from complex engineering equations to financial forecasts.

Boasting 250 advanced functions across scientific, statistical, financial, and computer science domains, the HP-27S features algebraic entry with operator precedence for intuitive, error-free calculations. Its crisp 2-line LCD display (10-digit mantissa, 7-digit exponent) shows both input and results simultaneously, while menu-driven operation and softkeys make navigation a breeze—no dense manuals required.

Crafted with HP's signature durability, the HP-27S was a favorite among professionals until its discontinuation in 1993, blending elegance with unyielding accuracy. Today, it's a collector's gem—a testament to an era when calculators weren't just tools, but trusted companions for the mathematically minded. Whether restoring a classic or reliving the thrill of analog computation, the HP-27S reminds us: true innovation never goes out of style.

It comes with fresh batteries and our true leather Pioneer case