Hewlett-Packard HP-67

Date of introduction:  July 1, 1976 Display technology:  LED
New price:  $450 (MSRP 1976) Display size:  10 + 2 
Size:  5.9" x 3.2" x 1.40"
 151 x 81 x 36 mm3
Weight:  10.5 ounces, 298 grams Serial No:  1702A01984
Batteries:  HP-82001A (3*NiCd AA-size) Date of manufacture:  wk 02 year 1977
AC-Adapter:  HP-82002 Origin of manufacture:  United States
Precision:  10 Integrated circuits:  
Logic:  RPN    
Memories:  26    
Program steps:  224 Courtesy of:  Ken H. Meine

Hewlett Packard improved the HP-65 in the year 1976 to compete with the Texas Instruments SR-52. The new HP-67 featured 224 merged program steps and 26 memories instead of 100 partially merged steps and 9 memories found in the HP-65.

The HP-67 still uses the Reverse Polish Notation with the [ENTER] key instead the usual [=] key.

The rivalry between calculator users of Hewlett Packard and Texas Instruments products battled a long time introducing a lot of funny benchmark programs and programming tricks before the HP-41C appeared and the race was decided.

Learn more about Mostek Calculator Integrated Circuits.

The featured HP-67 with Date code 1702A manufactured in January 1977 by Hewlett Packard in ithe United States is powered by 3 AA-size rechargeable batteries. This HP-67 was provided by fellow collector Ken H. Meine and we decided not to disassemble it.

Milestones of HP calculators

Hewlett-Packard (HP) introduced in 1968 the World's first desktop scientific calculator, the HP 9100A. The programmable calculator stores programs on magnetic cards and lets scientists perform complex calculations without the need to access much larger computers. It is 10 times faster than most machines at solving science and engineering problems. Advertisements for the 9100A call the device a "personal computer," one of the first documented uses of the term.

Only 4 years later, on January 4, 1972, HP makes another advance in personal computing with the HP-35, the World's first scientific handheld calculator. Small enough to fit into a shirt pocket, the powerful HP-35 makes the engineer's slide rule obsolete. With the HP-80 a similar business model was introduced in February 1, 1973. In May of 1973 the HP-45 followed before the first programmable model HP-65 was introduced in January 19, 1974 with a retail price of $795. The HP-70 was introduced in August 1974 to complement the HP-80 as lower end business calculator and it took another few months till the introduction of the HP-55 in January 1975, the last calculator in Hewlett-Packard's series of "First Generation Handheld Calculators". Early in the year 1975 the price tag of the HP-35 dropped to $195 and the calculator was discontinued soon after with the introduction of its successor HP-21, a member of the "Second Generation Handheld Calculators". The introduction of the HP-31E in May 1978 together with its siblings HP-33E and HP-38E marked with the "Third Generation of Handheld Calculators" the end of HP calculators with LED Displays before introducing the revolutionary HP-41C with its alphanumeric LC-Display in July 1979 and the everlasting HP-12C and its sibling HP-11C in September 1981.

In the year 1975 dozens of companies manufactured calculators with 4 functions and a selling price below $20, scientific and business calculators in the range around $100 and programmable calculators priced about $250. The slide rule was outdated and famous companies like Dennert & Pape (ARISTO), A.W. Faber-Castell and Keuffel & Esser stopped the production.

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Joerg Woerner, May 3, 2002. No reprints without written permission.