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**1973  "HP Measurement/Computation:changing things for the better", //Scientific American//, July 1973, pp. 6-7. Original print article.**

Two full pages advertisement for the HP-35, HP-45 pocket  and HP-46 desktop printing scientific calculators.

**Note similar machines in collection Calculant:**

* [[HP-35-1972|July1972: Hewlett Packard HP 35 Calculator serial 1230A 79429, 1972 (second version)]]

* [[HP-45-1973|December 1973: Hewlett Packard HP 45 Calculator serial 1350A 36719, 1973]]