On Thu, 27 Sep 2001, Douglas Quebbeman wrote:
  Way back in '77 (I think), I got a mailing
from TI advertising and
 offerring for sale the TI Programmer, which was a simple 4-function
 calculator in that standard black-plastic format they used to use,
 replete with the also-standard LEDs. However, it wasn't actually a
 four-function calculator, because it included radix conversion and
 several standard logical operators.
 At home, when I need radix conversion, instead of the Casio Fx-115m or
 the Calc accessory, I still reach for the TI Programmer... 
 The TI "Programmer" (NOT to be confused with "programmable") was one
of
 the first basic calculators to offer hexadecimal arithmetic and
 hex/decimal conversion.  The LED display really ate batteries, and it
 could go through a battery discharge in less time than it takes Windoze to
 boot.  But if you kept it plugged into the wall, it worked great.
 Then they came out with a new model of it with LCD display.  The batteries
 got great life, but the keyboard tended to go before the batteries.
 If you like having a calculator that includes hex, one of the really neat
 ones is the Casio CFX-40 and CFX-400.  It requires good eyes and good
 dexterity, since it is a "scientific" calculator in a watch.  It's biggest
 weakness was a tendency to crack between the display and the keyboard.
 I've replaced the case on several.
 --
 Grumpy Ol' Fred        cisin(a)xenosoft.com
 
And for those with weak eyes, there is always the Casio CM-100
solar-powered `computer math calc' handheld.  I think no longer
manufactured, though.
                                                 - don