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2. HP 35s - Wikipedia

   en.wikipedia.org/wiki/HP_35s

   Dimensions. 158 × 82 × 18.2 mm (6.22 × 3.23 × 0.72 in) The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific ...

3. Scientific calculator - Wikipedia

   en.wikipedia.org/wiki/Scientific_calculator

   A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and complex (trigonometric, hyperbolic, etc.) mathematical operations and functions. They have completely replaced slide rules as well as books of mathematical tables and ...

4. TI-30 - Wikipedia

   en.wikipedia.org/wiki/TI-30

   TI-30. The TI-30 is a scientific calculator manufactured by Texas Instruments, the first model of which was introduced in 1976. While the original TI-30 was discontinued in 1983 after several design revisions, TI maintains the TI-30 designation as a branding for its low and mid-range scientific calculators.

5. HP-27S - Wikipedia

   en.wikipedia.org/wiki/HP-27S

   Power supply. 3×1.5V button cell batteries (Panasonic LR44, Duracell PX76A/675A or Energizer 357/303) Weight. 6 oz (170 g) Dimensions. 148×80×15mm. The HP-27S was a pocket calculator produced by Hewlett-Packard, introduced in 1988, and discontinued between 1990 and 1993 (sources vary). It was the first HP scientific calculator to use ...

6. HP-20S - Wikipedia

   en.wikipedia.org/wiki/HP-20S

   The HP-20S (F1890A) is an algebraic programmable scientific calculator produced by Hewlett-Packard from 1987 to 2000.. A member of HP's Pioneer series, the 20S was a low cost model targeted at students, using the same hardware as the HP-10B business calculator.

7. HP calculators - Wikipedia

   en.wikipedia.org/wiki/HP_calculators

   Range entry calculator, Scientific Programmable, statistical functions. HP-10S+ 2012 A dual-powered (battery and solar cells) algebraic scientific calculator with 2-line dot matrix and segment display. HP-11C: 1981 Scientific Programmable, including hyperbolics, gamma function, statistical functions, and random number generation. HP-10s: 2007