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Hewlett-Packard HP 28S Clamshell? ORLANDO

The Hewlett-Packard HP 28S Clamshell? ORLANDO is a graphing calculator with 10 digits precision and RPN (reverse polish notation) logic. It has 1500 functions, 78 keys and an LCD (liquid crystal) display.

Facts at a glance:

Type Graphing
Functions 1500
Keys 78
Precision 10
Logic RPN
Display type LCD
Display size 137x32
Printer IR ext
Length 165 mm
Width 191 mm
Thickness 13 mm
Weight 227 g
Power Source
Country
Original price unknown
Est. current value unknown
Year introduced 1988
Year discontinued 1992

See other calculators manufactured by Hewlett-Packard.