HP 35s

The HP 35s is a scientific calculator from Hewlett -Packard, which was released in 2007. He is the current representative of a long line of non- graphical, scientific and programmable calculators by Hewlett -Packard. Although chronologically is the successor of the HP 33s, he was introduced in honor of the 35th anniversary of the HP- 35, which was the world's first scientific pocket calculator ever.

Although the HP 35s far more features, computing power and memory than the original HP -35, Hewlett -Packard has tried to give it the appearance of the HP -35 and other HP calculators of that time. The unit possesses the earlier HP calculators typical front beveled buttons.

Characteristics as compared to the historical HP -35

The HP 35s can be operated as all units of his generation, both in classical Reverse Polish Notation as well as in algebraic notation. Unlike the original HP -35, the HP 35s can be programmed by recording keystrokes. The program thus prepared may contain conditional and unconditional branches and loops in addition to the normal operations.

Other special features include:

  • A two line alphanumeric liquid crystal matrix display
  • Partially on screen menu ( eg for the display format )
  • Memory register 26 (indicated by the letters A -Z) and an index register
  • Scientific and statistical functions
  • Different number systems: decimal, binary, octal, hexadecimal
  • Numerical solution of equations ( for the first time available on the HP - 34C )
  • Numerical integration ( also the first time the HP - 34C )
  • Input and display fractions ( first time in the HP- 32SII )
  • Complex numbers ( for the first time available on the HP -15C ), and vector calculus
  • Unit conversion and table of physical constants
  • About 30 KiByte memory for programs and / or data

Differences to its predecessor, the HP 33s

The exterior and the key assignment of the HP 35s are very different from its immediate predecessor, the HP 33s. However, both are functionally almost identical.

The main differences are:

  • The HP 35s allows programs in addition to referencing markers (labels ) and the reference to line numbers. With only 26 marks ( letters AZ ) it was difficult to write programs that could take advantage of the full 30 KiByte of memory.
  • The memory of the HP 35S can also be used for storing about 800 addressable numbers.
  • The support vector operations is new in the HP 35s.
  • Indirect branches, which allowed to use the contents of a memory register as the destination (commands GTO and XEQ ) were the HP 33s yet available, however, absent in the HP 35s.

Development and production

Although the HP 35s is a reminder of the tradition of scientific HP calculators, the unit of Hewlett -Packard alone, but in cooperation with the Taiwanese company Kinpo Electronics Inc. was developed. The production is now exclusively with that OEM suppliers. The HP 35s uses the integrated circuit SPLB31A of Sun Plus, which includes a processor of type 8502 next to an LCD controller and IO unit.

Hewlett-Packard HP-35 HP-34C
401005
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