HP-28 series

Known as: HP-28, HP-28C, 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 calculator capable of…

Papers overview

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2006

Symbolic entry and a display large enough for plotting data are some of the useful features. Mechanical Design of the HP-18C and…

2006

fo ra l l l : l i s t n : na tura l S e t _ a b s ( n i l ) = p h i S e t _ a b s ( c o n s ( n , l ) ) = { n } U S e t _ a b s…

2002

Using LISP as the programming basis, Carl Engelman created MATHLAB in 1964 at MITRE within an artificial intelligence research…

1991

Abstract : Handheld calculators are now powerful enough to have become indispensible tools for the engineer and scientist. With…