HP-28S. The HP-28C and HP-28S were two graphing calculators produced by Hewlett-Packard from 1986 to 1992. The HP-28C was the first handheld calculator capable of solving equations …

The HP-28S became the more common and popular calculator of the two. It is a lightweight handheld scientific and graphing calculator that weighs in at a mere 7.2 oz. It is pocket sized …

hp-28c/s With the HP-28C, Hewlett-Packard completely revamped the scientific calculator. This model did symbolic math, used named variables, understood many data types and was the …

Free download of a color scan of the English-language book 'HP-28S Owner's Manual' by Hewlett-Packard, which is an owner's manual (user's guide, operating manual, owner …

In ~1991, i bought the HP-28s calculator for ~$250. It was introduced in 1988 and is the first calculator that is capable of symbolic computation. For example, you can use it to solve …

The 28S is an improved version of the 28C, with more RAM (32 kB vs. 2 kB), a faster processor, directories, and a few more mathematical functions (e.g., PERM, COMB). The 28 takes 3 "N" …

Hp -28S Quick Reference (49 pages) Direct-Key Commands Brand: Hp | Category: Calculator | Size: 0.28 MB

HP-28S notes: To start the continuous self test, with the calculator turned on, press and hold ON and press . The calculator will step through a series of self-tests and will display OK-28S …

HP-28S Famous calculator made by Hewlett-Packard from 1988 – 1992. Memory 32768 bytes for stack, programs and data. Approximately 31.6 kBytes available to the user.

2002年10月23日 · It turns out that the HP-28S is a surprisingly fast unit! It easily beats the Casio fx-880P, Casio fx-2000C, TI-74 and the HP-32SII. Compared to the HP-15C/41CV/CX it is …