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2. Solar-powered calculator - Wikipedia

   en.wikipedia.org/wiki/Solar-powered_calculator

   The first solar-powered (non-scientific) calculators available in the late 1970s included the Royal Solar 1, the Sharp EL-8026, and the Teal Photon. Scientific solar-powered calculators appeared in 1982. Solar calculators use liquid crystal displays, as they are power-efficient and capable of operating in the low-voltage range of 1.5–2 V.

3. HP-22S - Wikipedia

   en.wikipedia.org/wiki/HP-22S

   Dimensions. 148×80×15mm. The HP-22S is an electronic calculator from the Hewlett-Packard company which is algebraic and scientific. This calculator is comparable to the HP-32S. A solver was included instead of programming. It had the same constraints as the 32S, lacking enough RAM for serious use. Functions available include TVM and unit ...

4. TI-15 Explorer - Wikipedia

   en.wikipedia.org/wiki/TI-15_Explorer

   TI-15 Explorer. TI-15 Explorer is a calculator designed by Texas Instruments, intended for use in classes from grades 3-5. It is the successor to the TI-12 Math Explorer. For younger students, TI recommends the use of the TI-108. For older students, TI recommends the use of the TI-73 Explorer . Features include a 2-line pixel display (as ...

5. Hewlett-Packard 9100A - Wikipedia

   en.wikipedia.org/wiki/Hewlett-Packard_9100A

   The Hewlett-Packard 9100A ( HP 9100A) is an early programmable calculator [3] (or computer), first appearing in 1968. HP called it a desktop calculator because, as Bill Hewlett said, "If we had called it a computer, it would have been rejected by our customers' computer gurus because it didn't look like an IBM.

6. Mercedes-Euklid - Wikipedia

   en.wikipedia.org/wiki/Mercedes-Euklid

   Mercedes-Euklid. The Mercedes-Euklid is a German -invented calculator from the early twentieth century. It was built by Mercedes Büro-Maschinen Werke AG in Thuringia, Germany in 1905. The first manual mechanical models utilized a proportional-lever design invented by Christel Hamann in 1903. An electric model, the Mercedes Euklid 30, was ...

7. Category:History stubs - Wikipedia

   en.wikipedia.org/wiki/Category:History_stubs

   This category has the following 26 subcategories, out of 26 total. Archaeology stubs ‎ (8 C, 162 P) History book stubs ‎ (7 C, 252 P) Classical studies stubs ‎ (6 C, 93 P) Cultural history stubs ‎ (7 C, 69 P) Historical documentary stubs ‎ (1 C, 65 P) Earthquake stubs ‎ (4 C, 20 P) Historian stubs ‎ (6 C, 219 P)