Hewlett-Packard’s HP 48GX is the most powerful calculator in the 48 series, offering the same advanced calculation and programmability features as its siblings, along with expansion options that should appeal to power users and programmers. All this is made possible by the expansion card slot, which lets users expand the built-in memory from 128 KB to a maximum of 1.256 MB or install application software that adds more advanced features to the calculator. The 48GX is no slouch. Its colorful array of buttons lets users tap into 2,300 built-in functions, 300 of which are built-in formulas and scientific constants[Read More]