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A grocery store (AE), grocery shop (BE) or simply grocery[ 1 ] is a retail store that primarily retails a general range of food products, [ 2 ] which may be fresh or packaged. In everyday U.S. usage, however, "grocery store" is a synonym for supermarket, [ 3 ] and is not used to refer to other types of stores that sell groceries.
A graphing calculator (also graphics calculator or graphic display calculator) is a handheld computer that is capable of plotting graphs, solving simultaneous equations, and performing other tasks with variables. Most popular graphing calculators are programmable calculators, allowing the user to create customized programs, typically for ...
A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. It was designed in the 1820s, and was first created by Charles Babbage . The name difference engine is derived from the method of divided differences , a way to interpolate or tabulate functions by using a small set of polynomial co-efficients.
Department store. A department store is a retail establishment offering a wide range of consumer goods in different areas of the store, each area ("department") specializing in a product category. In modern major cities, the department store made a dramatic appearance in the middle of the 19th century, and permanently reshaped shopping habits ...
Discount superstores such as Walmart or Target sell general merchandise in a big-box store; many have a full grocery selection and are thus hypermarkets, though that term is not generally used in North America. [2] In the 1960s and 1970s the term "discount department store" was used, and chains such as Kmart, Zodys and TG&Y billed themselves as ...
A supermarket is a self-service store consisting mainly of grocery and limited products on non-food items. [29] They may adopt a Hi-Lo or an EDLP strategy for pricing. The supermarkets can be anywhere between 20,000 square feet (1,900 m 2) and 40,000 square feet (3,700 m 2). An example is a SPAR supermarket.
A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions. They have completely replaced slide rules as well as books of mathematical tables ...
The Curta was conceived by Curt Herzstark in the 1930s in Vienna, Austria.By 1938, he had filed a key patent, covering his complemented stepped drum. [3] [4] This single drum replaced the multiple drums, typically around 10 or so, of contemporary calculators, and it enabled not only addition, but subtraction through nines complement math, essentially subtracting by adding.