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Comedian is a 2019 artwork by Italian artist Maurizio Cattelan.Created in an edition of three, it appears as a fresh banana affixed to a wall with duct tape.As a work of conceptual art, it consists of a certificate of authenticity with detailed diagrams and instructions for its proper display.
Canon Pocketronic calculator prints output using paper tape (1971). Programmable pocket calculators The first programmable pocket calculator was the HP-65 , in 1974; it had a capacity of 100 instructions, and could store and retrieve programs with a built-in magnetic card reader.
Solar-powered calculators are hand-held electronic calculators powered by solar cells mounted on the device. [1] They were introduced at the end of the 1970s. [2]Amorphous silicon has been used as a photovoltaic solar cell material for devices which require very little power, such as pocket calculators, because their lower performance compared to conventional crystalline silicon solar cells is ...
Friden made a calculator that also provided square roots, basically by doing division, but with added mechanism that automatically incremented the number in the keyboard in a systematic fashion. The last of the mechanical calculators were likely to have short-cut multiplication, and some ten-key, serial-entry types had decimal-point keys.
The use of graphics on blotter sheets originated as an underground art form in the early 1970s, sometimes to help identify the dosage, maker, or batch of LSD. Images may be of various sizes but sheets are often 7.5-inch (190 mm)-square and perforated into a 30 by 30 grid.
A receipt printed on thermal paper. A heat source near the paper will color the paper. Paper roll for thermal fax machine. Thermal paper (often supplied in roll form, and sometimes referred to as an audit roll) is a special fine paper that is coated with a material formulated to change color locally when exposed to heat.