1988 HP Hewlett Packard 28S Advanced Scientific Calculator New Batteries Works
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Product details
| Management number | 3492776 | Release Date | 2025/08/12 | List Price | $96.85 | Model Number | 3492776 | ||
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1988-92 Hewlett Packard 28S Advanced Scientific Calculator New Batteries Working
The HP-28S has a larger memory than the 28C, operated more rapidly, and has a subdirectory structure for variables. On the Back it reads HEWLETT-PACKARD CO. 1986 MADE IN U.S.A 2823A05242. HP-28S uses a custom chip containing an improved Saturn processor core codenamed Lewis and running at 1 MHz. The HP-28 calculator is a flip-open ( clamshell ) case. On the left side of the flip, there is an alphabetic keyboard (in alphabetic order). On the right was a typical scientific keyboard layout. The display was a 137×32 LCD dot matrix, usually displaying four lines of information (3 stack/command lines, plus one softkey label line). Uses three N-sized batteries makes it a considerably strong force.
The HP-28S offers the following features:
Algebraic manipulation. You can expand, collect, or rearrange terms in an expression, and you can symbolically solve an equation for a variable.
Calculus. You can calcula
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