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2. Calculator input methods - Wikipedia

   en.wikipedia.org/wiki/Calculator_input_methods

   Calculator input methods. There are various ways in which calculators interpret keystrokes. These can be categorized into two main types: On a single-step or immediate-execution calculator, the user presses a key for each operation, calculating all the intermediate results, before the final value is shown. [1] [2] [3]

3. ISO 8601 - Wikipedia

   en.wikipedia.org/wiki/ISO_8601

   t. e. ISO 8601 is an international standard covering the worldwide exchange and communication of date and time -related data. It is maintained by the International Organization for Standardization (ISO) and was first published in 1988, with updates in 1991, 2000, 2004, and 2019, and an amendment in 2022. [1]

4. Reverse Polish notation - Wikipedia

   en.wikipedia.org/wiki/Reverse_Polish_notation

   By this time, HP was the leading manufacturer of calculators for professionals, including engineers and accountants. Later calculators with LCDs in the early 1980s, such as the HP-10C , HP-11C , HP-15C , HP-16C , and the financial HP-12C calculator also used reverse Polish notation.

5. Mechanical calculator - Wikipedia

   en.wikipedia.org/wiki/Mechanical_calculator

   This picture shows clockwise from top left: An Arithmometer, a Comptometer, a Dalton adding machine, a Sundstrand, and an Odhner Arithmometer. A mechanical calculator, or calculating machine, is a mechanical device used to perform the basic operations of arithmetic automatically, or (historically) a simulation such as an analog computer or a ...

6. Moving average - Wikipedia

   en.wikipedia.org/wiki/Moving_average

   A moving average is commonly used with time series data to smooth out short-term fluctuations and highlight longer-term trends or cycles. The threshold between short-term and long-term depends on the application, and the parameters of the moving average will be set accordingly. It is also used in economics to examine gross domestic product ...

7. Timesheet - Wikipedia

   en.wikipedia.org/wiki/Timesheet

   Timesheet. A timesheet (or time sheet) is a method for recording the amount of a worker's time spent on each job. Traditionally a sheet of paper with the data arranged in tabular format, a timesheet is now often a digital document or spreadsheet. The time cards stamped by time clocks can serve as a timesheet or provide the data to fill one.