HP 16C Computer Scientist Calculator

Classic Hewlett-Packard Voyager-series RPN calculator designed for programmers and computer scientists (produced 1982–1989).

Features integer arithmetic and conversions in hexadecimal, decimal, octal, and binary; configurable word size (1–64 bits); unsigned / 1’s complement / 2’s complement modes; bit shifts, rotates, masks, and logical operations (AND, OR, XOR, NOT); floating-point decimal math; keystroke programming with up to 203 bytes of continuous memory; and the reliable Voyager form factor.

Ideal for collectors, retro-computing enthusiasts, or anyone who needs a dedicated programmer’s tool.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​