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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. Reverse Polish notation - Wikipedia

   en.wikipedia.org/wiki/Reverse_Polish_notation

   Video: Keys pressed for calculating eight times six on a HP-32SII (employing RPN) from 1991. Reverse Polish notation (RPN), also known as reverse Łukasiewicz notation, Polish postfix notation or simply postfix notation, is a mathematical notation in which operators follow their operands, in contrast to prefix or Polish notation (PN), in which operators precede their operands.

4. Time-tracking software - Wikipedia

   en.wikipedia.org/wiki/Time-tracking_software

   Time-tracking/recording software. Time-tracking/recording software automates the time-tracking process by recording the activities performed on a computer and the time spent on each of them. This software is intended to be an improvement over timesheet software. Its goal is to offer a general picture of computer usage.

5. 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.

6. Entrance length (fluid dynamics) - Wikipedia

   en.wikipedia.org/wiki/Entrance_length_(fluid...

   In fluid dynamics, the entrance length is the distance a flow travels after entering a pipe before the flow becomes fully developed. [1] Entrance length refers to the length of the entry region, the area following the pipe entrance where effects originating from the interior wall of the pipe propagate into the flow as an expanding boundary ...

7. Moving average - Wikipedia

   en.wikipedia.org/wiki/Moving_average

   In statistics, a moving average ( rolling average or running average or moving mean [1] or rolling mean) is a calculation to analyze data points by creating a series of averages of different selections of the full data set. Variations include: simple, cumulative, or weighted forms. Mathematically, a moving average is a type of convolution.