The HP Zone

My prefernece for Texas Instruments calculators over Hewlett-Packards is well-established.  That's not to say that there isn't a segment of my collection where these models live.  It's just not a large section...(it is, however, slowly getting larger)

1. HP-10S: A new-order business calculator with (gasp!) algebraic logic.
2. HP-20S: A scientific calculator with algebraic logic.

1. HP-6S: A scientific algebraic model in metallic blue.
2. HP-30S: One of HP's newest machines, this one comes with interchangeable faceplates in gray and aqua in addition to purple.

A few less-recent models--both using the RPN logic that sets HP apart from TI:
1. HP-21: Earlyish scientific HP.
2. HP-67: Magnetic card programmable model; top of the HP line in the mid-70's.

1. HP-45: A scientific calculator which was given to me by the Albion College Department of Physics.
2. HP-41CV: An extension of the HP-41 line of alphanumeric scientific calculators.  This one has a removable face plate installed, primarily because it photographs well.

HP-97: Larger printing version of the HP-67 with fewer shift keys.

HP-28S: Hewlett-Packard's first graphing calculator.  This calculator is on permanent loan from the Albion College Department of Mathematics and also does symbolic manipulation.

1. HP-38G: A later graphing calculator.  It's showing the simultaneous graph of all six basic trig functions (this calculator has secant, cosecant, and cotangent as separate functions).
2. HP-82240A Printer: This printer uses infrared technology to print information from several HP machines, including the 38G and 28S shown here.

HP-39G:  Larger picture for better detail, showing part of its menu-driven system.
HP-48G: A more recent graphing calculator, this one showing my favorite function, f(x) = etan(ln x), on the interval (0,1].

Not yet pictured: HP-6S Solar, HP-12C.

 

Last revision: 13 February 02003.
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