Next to Texas Instruments, my favorite calculators are probably from National Semiconductor. Many of these were marketed under the Novus brand name, which was adopted by NSC for its calculator division.

**Novus
Mathbox 650**: My first calculator (01977) was a Novus Mathbox like the one on
the left above. A couple of different case styles exist; all have a
decimal point fixed at two places which allows them to get along with only
fifteen keys. The Mathbox uses reverse Polish notation, something of a
rarity on four-function calculators.

**Novus
Professional 822**

**Novus
Executive**: This unusual calculator is shown with its power source, a
Duracell Flat-Pak 9-volt battery. The battery is inserted in a slot
beneath the silver strip at the right.. The Executive has exposed
electronics on the back--the whole thing is designed to be carried in a folding
case.

**Mathematician
4510**: Two name variations of this calculator exist, one under Novus and the other
under National Semiconductor. A variety of case styles was also
produced--the first and third above have white cases; the second is black.
(A third, programmable, version, the
Mathematician 4515, was also made.) The Mathematicians contain an unusual "M + x^{2}"
key that is useful in statistical calculations.

**Financier
6020, Financier PR 6025**: The PR adds programmability to the 6020--both
handle common financial calculations with preprogrammed keys.

**1.
NSC
International Computer**: Preprogrammed with common metric conversions, this
calculator debuted in the 01970's at the height of America's failed rush to
convert completely to metric measurement.**2. NSC 4660**: A scientific
calculator with a collection of unit conversion keys.

Last revision: 20 January
02002.

This page is Y10K compliant.

This page is Y10K compliant.